Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors . These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain , providing three forward speeds plus reverse.
121-550: [REDACTED] Look up thm in Wiktionary, the free dictionary. THM , Thm , thm or ThM may refer to: Turbo-Hydramatic , GM vehicle transmission Ton of heavy metal in a nuclear power plant Ton of hot metal in the steel industry Trihalomethanes in chemistry Therm , a unit of heat energy Technische Hochschule Mittelhessen—University of Applied Sciences Master of Theology postnominal, ThM "T.H.M.",
242-588: A P R N D 3 2 1 quadrant, while later models used P R N 🄳 3 2 1 . The THM200-4R can be found in the following vehicles: The THM200-4R was phased out after 1990; its final usage was in the GM B-body vehicles. The four-speed Turbo Hydra-Matic 700R4 was introduced for the 1982 model year for use in Chevrolet/GMC vehicles. In 1990, the Turbo Hydra-Matic 700R4 was renamed
363-529: A buyout rather than switch to all-electric. Aldred explained the move saying that making the transition to electric would require a considerable investment in upgrading dealer facilities and not all dealers would be willing to make the financial commitment. Aldrerd also pointed out that most Buick dealers also sold other GM products, so accepting the buyout would not necessarily result in a dealership closing. Once Buick's top-selling model in North America,
484-455: A 32 spline output shaft. A variant known as a THM375 is a THM400 built to mate to the smaller driveshaft yokes typically used for THM350 applications. They used a Chevrolet bolt-pattern case with a longer 27 spline output shaft inside a matching tailhousing cast with a "375-THM" or "TH375" identifier. Internally, the clutch packs originally had fewer friction plates. THM375s were found in some 1971-76 Buick Lesabres and Oldsmobile Delta 88s with
605-631: A 50-year absence as a new performance trim level on LaCrosse and Lucerne. The brand's total overall sales slipped in the United States, and, with a reputation for primarily appealing to older buyers, rumors circulated throughout this decade that the Buick marque would be discontinued. The profitability of the model lineup and popularity in China ensured Buick's future within General Motors, with
726-619: A LeSabre Grand National model was built to qualify the coupe body style for NASCAR competition. Less than 120 units were made, all finished in black with a gray interior. Also for 1986, the E-body Riviera was converted to unibody construction and further downsized to a 108 in (2,700 mm) wheelbase similar in length to that of the Buick Regal . The V6 was now the only engine, rated initially at 142 hp (106 kW) SAE and 200 lb⋅ft (270 N⋅m) of torque. It used
847-777: A brief term as GM president. Also in 1980, the Diesel engine became available on select Buick models and Somerset was introduced as an optional package on the Regal Limited. In 1981, the T-Type performance trim was introduced on the Riviera. Regal was the official pace car of the Indianapolis 500 race in 1981. In 1982, the Grand National high-performance package was first offered on Regal. A soft-top Riviera helped lead
968-510: A carbureted 3.0 liter Buick V6 engine , a fuel-injected 3.8 liter Buick V6 engine, or a 4.3 liter Oldsmobile diesel V6 engine. Each was mated to a 4-speed automatic transmission with a 0.70:1 overdrive gear. The 3.0 liter V6 and 4.3-liter diesel V6 were discontinued after 1985. During the 1985 through 1989 model years, the Electra name also continued to be used on the rear-wheel-drive B-body "Estate" station wagon. Also in 1985, Buick introduced
1089-442: A change of a servo piston from using split Teflon sealing rings to a servo using lip seals. A real problem area was the stamped-steel drive shell, which would strip out, losing reverse. With the 1985 production run, GM started installing a hardened drive shell, but continued to supply the original style until parts inventories were exhausted. Another major problem area was the pump assembly. The pump halves were made of cast aluminum and
1210-454: A choice of three suspension packages available, up to the performance oriented FE3 setting, handling was notably improved. The Riviera placed fourth for Motor Trend ' s 1986 Car of the Year contest. Fuel economy was notably improved for the 1986 Riviera, but the investment in the downsized, transverse engine front-wheel drive platform resulted in a substantial price increase to $ 19,831 for
1331-467: A designation which hearkened back to several Silver Arrow show cars that had been built off Riviera bodies by Bill Mitchell . The eighth generation Rivieras received the most powerful V6 Buick engine since the Grand Nationals of the 1980s. The supercharged OHV V6 gave impressive torque and acceleration, pushing the car from 0 to 60 miles per hour (97 km/h) in under 7 seconds, and turning
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#17327905730541452-643: A more powerful Century. Since the first Detroit experimental car of 1899–1900 and the first Flint production car of 1904, more than 35 million Buicks had been built. The 2000 LeSabre was introduced in March 1999 and was now built on GM's G platform ; however, GM chose to continue to refer to it as the H platform. The LeSabre was manufactured at GM's Detroit/Hamtramck Assembly factory in Hamtramck, Michigan and Lake Orion Assembly, in Lake Orion, Michigan. Some of
1573-575: A number of new models added to the Buick lineup including the Estate Wagon as its own model in 1970, Centurion in 1971, Apollo in 1973, and Skyhawk in 1975. 1975 also saw the first appearance of the " Park Avenue " nameplate for Buick as a trim/option package on the Electra 225 Limited. A Buick Century paced the Indianapolis 500 race not once but twice in the mid-1970s. In 1976, Buick began selling rebadged Isuzu Geminis as Opels to replace
1694-659: A preference for the Canadian built McLaughlin-Buick. Buicks were used for royal transport within Canada, including for King George VI and Queen Elizabeth during the 1939 royal tour of Canada . In the 1920s and 1930s Cadillac and Buick vehicles were popular with long-distance passenger service operators e.g. the Nairn Transport Company in the Middle East (Baghdad-Damascus). 1940 saw the first use of
1815-533: A redesigned 4L60E transmission case that incorporated a bolt-on bellhousing and a six-bolt tail housing. This two-piece case style was first seen in 1996 and up model S-10 Blazer , S-10 pickup, GMC Jimmy , and GMC Sonoma with the 4.3 L engine. The majority of 1998 and later applications of the 4L60E were two-piece cases (i.e. a removable bellhousing). Both transmissions are the same internally. The non-PWM (1993-1994) style 4L60Es are not interchangeable with PWM-style (1995 and later) 4L60Es. Also in 1996, GM changed
1936-586: A result, usually more expensive to buy (they were commonly found in 3/4 ton (8500 GVW and above) Chevrolet/GMC trucks and vans (includes the P-series box vans and 1983-86 CUCVs) when RPO M40 was checked off the option list - especially when coupled to a 454 - usually in HD applications including the C40-C60 medium duty trucks where a bolt-on output shaft is used in place of a slip yoke) - when used with passenger cars it
2057-552: A seven-year absence. For 2012, the all-new Verano , which was a compact sedan based on the Chevrolet Cruze , joined the lineup. Additionally, the performance-oriented Regal GS officially went on sale and became the first Buick in almost 20 years to be offered with a manual transmission and a turbocharger. Buick also entered the hybrid market with the introduction of eAssist technology on the 2012 LaCrosse and Regal which helped improve fuel economy ratings by as much as 38% over
2178-634: A slight redesign for 1998. The LSx engines used a longer one to accommodate a redesigned torque converter, commonly referred to as a 300mm converter, with a longer pilot nose (GM sells an adapter assembly for using the LSx 4L60Es when used with an early engine). There are two bellhousings for the Holden GM models. One for the Corvette drivetrain. One for the S/T platform with 2.2L and 3.8L engines. And finally, two for
2299-486: A song by Deerhunter from the album Monomania (2013) Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title THM . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=THM&oldid=1259143067 " Category : Disambiguation pages Hidden categories: Short description
2420-429: A special edition LeSabre was sold to commemorate Buick's 90th anniversary. In addition to Custom trim level standard equipment, included were "90th Anniversary" badging, cassette player, cruise control, rear-window defogger, power driver's seat, carpeted floor mats, exterior pinstripes, and choice of wire or aluminum wheel covers. In 1995, after a hiatus in 1994, the Riviera returned with radical styling that departed from
2541-455: A washer seal. 5/16" or 3/8" rigid coolant lines are generally connected via appropriate double-flared adapters. Four-wheel drive truck applications used 3 various shorter output shafts that coupled with a female transfer case input shaft. Early transfer cases mated directly to the THM400 with a cast-iron adapter, usually a vertical oval shape. Later models used a circular style iron adapter which
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#17327905730542662-630: Is different from Wikidata All article disambiguation pages All disambiguation pages Turbo-Hydramatic The Turbo-Hydramatic or Turbo Hydra-Matic (THM) series was developed to replace both the original Hydra-Matic models and the Buick Dynaflow . In its original incarnation as the Turbo-Hydramatic 400, it was first used in the 1964 model year in Cadillacs . The Buick version, which followed shortly thereafter,
2783-879: Is generally considered the stronger of the two. The shortest was used with the NP203 transfer case. The Turbo Hydra-matic 350 was first used in 1969 model cars. It was developed jointly by Buick and Chevrolet to replace the two-speed Super Turbine 300 and aluminum-case Powerglide transmissions. So, although it carries the Turbo Hydra-matic name, the Hydra-matic Division of General Motors had little, if anything, to do with its design. The 350 and its 250, 250C, 350C and 375B derivatives have been manufactured by Buick in its Flint, Michigan plant, and by Chevrolet in Toledo and Parma, Ohio and Windsor, Ontario. The THM350
2904-422: Is hydraulically shifted based on governor pressure and throttle valve (TV) cable position. 1992 was the last year of widespread usage of the 700R4 (4L60). The 1993 Camaro, Corvette and Typhoon were equipped with the last production 700R4. The last design change of the 700R4 was an added checkball to the valve body. In 1992 electronic controls were added, and it became the 4L60-E . The 4L60E is not easily swapped with
3025-544: Is inherently balanced, with torque presented to the chassis in a longitudinal manner. The engine was mounted amidships . Billy Durant was a promoter, and Buick soon became the largest carmaker in America. Durant embarked on a series of corporate acquisitions, calling the new firm General Motors . At first, the manufacturers comprising General Motors competed against each other, but Durant ended that. He wanted each General Motors division to target one class of buyers. Buick
3146-589: Is no fixed center support midway through the geartrain; this difference in layout would have permitted the THM350 to be adapted to the Corvair where the drive and driven ends are the same, but this feature was not exploited. Air-cooled versions (with a baffle on the torque converter and air intakes cast into the bellhousing) of the THM350 appeared mid-1972 in the Chevrolet Vega and Nova 6. One THM350 weak point
3267-404: Is part of the center support). Since the first gear reactive force is evenly distributed around the periphery of the case, the types of mechanical (and some times violent) failures that have plagued other competition transmissions are rare. The THM400 was the first three-speed, Simpson-geared automatic to use overrunning clutches for both first and second gear reaction, a feature that eliminated
3388-657: Is produced at "Buick City", a state-of-the-art assembly center built inside the walls of Buick's home plant in Flint. Buick had its best model year sales to date with 906,626 vehicles sold plus Buick's worldwide sales topped one million for the first time. Lloyd Reuss ended his tenure as general manager of the Buick Motor Division in 1984. For the 1985 model year, Buick introduced the downsized sixth-generation Electra, effectively GM's first front-drive, transverse-engine, full-size unibody cars — initially powered by
3509-508: Is the THM350-C, which was phased out in 1984 in GM passenger cars for the 700R4. Chevrolet / GMC trucks and vans used the THM350-C until 1986. The lock-up torque converter was unpopular with transmission builders. B&M Racing once marketed a conversion kit for THM350-Cs during the early 1980s until the advent of high stall lock-up torque converters when its overdrive counterpart (THM700R4/4L60)
3630-414: Is the relatively thin center support and the lightweight matching splines in the case. This weakness can be addressed by using an inexpensive aftermarket case saver kit. Four-wheel drive truck applications for the THM350 used an iron adapter that mated it to the transfer case directly, similar to the THM400. The THM350 adapter was cast iron and used a sliding sleeve to couple the transmission output shaft to
3751-411: The 1 ⁄ 4 mile in 15.5 seconds and achieved MPG fuel efficiency ratings of 18 city/27 highway. In the 2000s, Buick's lineup was modified with the compact and performance segments being abandoned in favor of the crossover/SUV market which was growing in popularity. In 2000, Buick headed into the new millennium with a redesigned LeSabre (best-selling U.S. full-size car for eight straight years) and
THM - Misplaced Pages Continue
3872-422: The 4L60 . Under the new designation, the "4" stands for the number of forward gears, the "L" for longitudinal applications (rear-wheel-drive), and the "60" is the strength rating (less than the 4L80). "60" is the relative torque value. For example, 80 is stronger than 60, which is stronger than 40, etc. A 4L80-E can handle more torque than a 4L60-E. The "E" denotes electronically controlled shifting. The 4L60 however
3993-608: The Buick Master Six . The Model 10 was phased out during a restructuring initiated by GM's new leadership that assumed position on November 15, 1910. In the 1910s and 1920s, Buick was a prestige brand in the Republic of China with the brand driven by or for high-level politicians and the Emperor . The latter imported two Buick cars in 1924, making it the first automobile to enter China. By 1930, Buick claimed one-sixth of
4114-605: The Ford Motor Company until 1903, and during the period in between was involved with other automobile manufacturers such as Cadillac , founded in 1902. The first two Buick automobiles were made in 1899 and 1900 at the "Buick Auto-Vim and Power Company" by chief engineer Walter Marr , but company owner David Dunbar Buick was reluctant to begin making automobiles, being satisfied with stationary and marine engine production, so Marr left Buick in 1901 to found his own automobile company under his own name. His replacement
4235-586: The Nissan Prince Royal ; AM General ; and Jeep (usually found in the FSJ pickups and SUVs ). Early Jeep THM400s used an adapter between the engine and transmission bell housing while later models had an AMC specific housing - which bolted to its inline six and V8. Though identical except for the bell housing pattern used through the '60s and ending in 1979 the THM400 was mated to the Dana model 18,20 and
4356-504: The Somerset as its own model. Buick-powered cars won the pole and second position in qualifying for Indianapolis 500. Over the next few years, Buick engines would set a number of stock-block records and twice would power a third or more of the 33-car Indy 500 field (11 in 1990 and 12 in 1992). 1985 would be the final year for the rear-drive LeSabre before another downsizing and conversion to front-wheel-drive for 1986 (sedans and coupes only;
4477-659: The " Estate " designation for Buick on the Super station wagon. World War II stopped automobile production in 1942. Starting that year, Buick produced the M18 Hellcat tank destroyer and supplied radial engines for the B-24 Liberator , Douglas C-47 Skytrain , and Douglas C-54 Skymaster . By the fall of 1945, automobile production resumed. In 1948, the Dynaflow automatic transmission was first offered by Buick. 1949 saw
4598-542: The 1901 or 1902 prototype with tiller steering similar to the Oldsmobile Curved Dash . In mid-1904, another prototype was constructed for an endurance run, which convinced Whiting to authorize the production of the first models offered to the public. The architecture of this prototype was the basis for the Model B. The first Buick made for sale, the 1904 horizontally opposed 2-cylinder engine Model B ,
4719-534: The 1973 OPEC oil embargo , GM developed a lighter-duty version of the THM350 with lightened materials — primarily alloys in place of ferrous materials (e.g. clutch drums and oil pump) — the Turbo-Hydramatic 200. The THM-200 was first used in 1976 models including GM's T-cars (which includes the rebadged Isuzu Gemini sold through Buick dealers as the Buick/Opel by Isuzu), X-cars , and some Isuzu automobiles (Chevrolet LUV and Isuzu P'up). However, this transmission
4840-667: The 1979 model year, vehicles which had the THM-200/200C as standard equipment were optioned with the THM250-C, which is a THM-350 without the intermediate clutch pack along with an adjustable band similar to the Chevrolet Powerglide. Also in the 1980 model year, the THM-200 received a lockup torque converter, and some internal components (primarily the low/reverse clutch drum and planetary gears) were later shared with
4961-623: The 19th century, Durant had made his fortune as co-owner, also in Flint, with Josiah Dallas Dort , of the Durant-Dort Carriage Company , which by 1904 was the largest carriage-making company in the country and one of the largest in the world. Durant moved most Buick production to the former Durant-Dort Imperial Wheel plant in Jackson, Michigan in 1905. Buick continued car production in Jackson through 1907, when Factory #1
THM - Misplaced Pages Continue
5082-459: The 3-2 solenoid to a different style which makes it not interchangeable with any previous models. For the model year 1996 GM trucks, there were two versions of the 4L60E: one had a bolt-on bellhousing, the other did not. In total, there are nine different bolt-on bellhousings. The bolt-on bellhousings used on the 4.3 L V6 and 1996-2002 GEN I+ versions of the small-block Chevrolet V8 used the same bellhousing. These had one from 1996 to 1997 and then
5203-413: The 4L60, as the 4L60E depends on a powertrain control module (PCM) to shift. The 4L60E went into service in trucks, vans, and SUVs in 1993 and in all RWD passenger cars (Corvette, F and B/D bodies) in 1994. In 2001, an updated version — the 4L65-E, was introduced. Five-pinion planetaries, along with a strength-improved output shaft, were improved to withstand the 300+ lb·ft (400+ N·m) of torque of
5324-500: The 4L80E. Today, the United States Army HMMWV is the only vehicle using the THM400. The civilian Hummer H1 originally had the 3L80s, but the current model has had a 4L80E since the mid-1990s. Through the end of the '70s substantially more CBOP (Cadillac/Buick/Oldsmobile/Pontiac) bellhousing THM400s were produced than any other THM400. Chevrolet bellhousing THM400s, while not rare, can be hard to find and are, as
5445-535: The 5.7 liter V-8. Somewhere in the Mid-'80s Chevrolet C10 Pickups could also come equipped with a THM375. Some "Heavy Duty" THM350s were also designated THM375-B. Another variant is the 3L80HD, often referred to as a Turbo 475. The 3L80HD has a straight-cut planetary gear set. There is no externally visible way to determine whether the transmission contains the straight-cut planetary gear set. The THM425 front wheel drive transmission shares almost all its internal parts with
5566-483: The 6.0 Vortec engine. The 4L70E transmission is the same as a 4L65E with a speed sensor located in the pump. The Turbo Hydra-Matic 700R4 can be identified by a rectangular-shaped oil pan with 16 bolt holes. The tailshaft housing is held onto the main case by four bolts (the bolt spacing is similar to the THM350), and uses a square-cut o-ring seal, and not a gasket. The typical width of this transmission where it bolts to
5687-402: The 700R4 the bottom fitting on the right side of the transmission is the "out" line to the cooler and the top fitting is for the return line from the cooler. These fittings are .25 in (6.4 mm) pipe thread, and can include an adapter from the factory for threaded steel lines in a SAE size. 4L60Es manufactured after 1995 use snap-in connections instead of threaded. The original version of
5808-561: The 700R4, most 200-4Rs have a multicase bellhousing for use with Chevrolet, Buick/Olds/Pontiac (BOP), and Cadillac engines. However, 200-4Rs share mounting locations with the TH-400. Since the external dimensions are longer than the TH-350 but the drive shaft yoke spline count/diameter was the same, the 200-4Rs can be swapped in place of TH-350s, with the shortening of the drive shaft, in older vehicles to provide an overdrive gear. Early models had
5929-510: The BOC (Buick, Oldsmobile, Cadillac) THM400s produced between 1964 and 1967 were equipped with a variable-pitch stator torque converter called " Switch-Pitch " (SP); these are sought after by collectors and drag racers. A SP THM400 always has an external 2 prong connector, whereas a non-SP may have one or two (mostly one, except two on vehicles equipped with an internal pressure switch for spark timing retard). A Switch Pitch can be identified outside
6050-660: The Centieme's exterior design and interior features would later appear on the 2008 Enclave crossover. In 2004, Buick added the Rainier mid-size SUV, and the new Terraza minivan was added a year later. In the years following, Buick began consolidating its North American lineup and by 2008 had reduced it to just three models: the LaCrosse /Allure, the Lucerne , and the new-for-2008 Enclave. The Super name had also returned after
6171-770: The Daytona 500 in a Regal that year. 1988 also saw the debut of the slogan "The Great American Road Belongs to Buick". In 1989, a new Electra trim level was offered called the Park Avenue Ultra. The Ultra was an upgrade to the Electra Park Avenue and featured a standard leather-trimmed interior with dual 20-way power front seats (shared with Cadillac's restyled 1989 Fleetwood Sixty Special ), lower-body accent exterior paint treatment, distinctive thick-padded vinyl top with limousine-style rear-window surround (available only on Ultra), simulated burled elm trim on
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#17327905730546292-684: The Encore was discontinued in 2022 as more customers favored the larger Encore GX which was introduced for 2020 and became Buick's new top seller. In 2023, the Envista launched for the 2024 model year. For the 2025 model year, Buick's North American lineup consists of the Envista and Encore GX subcompact crossovers, the Envision compact crossover, and the Enclave mid-size crossover. Buick has
6413-663: The LeSabre was introduced on the new front wheel drive H platform , after departing from rear wheel drive on the GM B platform . Joining the LeSabre on the H-body included the Oldsmobile Delta 88 . Like the previously introduced Electra, the LeSabre's hood was hinged at the front of the car instead of near the cowl and windshield. Styling and did not include Buick's long-standing ventiports or sweepspear styling cues. In 1986,
6534-405: The Model B was continued through the 1909 Model F. The Model F was similar to the Model G, a lower-priced two-seat roadster, produced from 1906 until 1909. Both the F and G were powered by a 159 cu in (2.6 L) two-cylinder 159 engine producing 22 hp (16 kW; 22 PS) along with a 2-speed transmission as well as mechanical brakes on the rear wheels. The flat-twin engine
6655-659: The North American market since the 1987 Skyhawk and the first station wagon since the 1996 Roadmaster. A sub-brand was also added in 2018 to accompany Buick, with the Avenir badge being applied to its top-of-the-line level trims, utilizing the same strategy as GMC's successful Denali sub-brand. 2019 would be the last year for the Cascada convertible globally and the LaCrosse sedan for the North American market. New for 2020
6776-437: The Nova and Camaro (1974 and 75 model year only). During the 1976 model year the THM250 was phased out of production, replaced with the lighter duty THM200. It was later reintroduced in 1979 as the THM250-C in the wake of the failure-prone THM200/200C - the later 250C was further lightened with the use of a sun gear shell used with the THM350 but with 3 holes to reduce rotating mass and the low/reverse piston with 8 cutouts. After
6897-464: The Opel Kadett models it had previously marketed. The following year, Electra 225 and LeSabre were redesigned and downsized, and the Buick brand saw its best model year sales to date with 773,313 vehicles sold. 1978 marked Buick's 75th anniversary and welcomed a redesigned Century as well as a redesigned Regal coupe which was now available with a turbocharged V6 engine. Buick model year sales broke another record in 1978 with 795,316 vehicles sold. In 1979,
7018-416: The Riviera was redesigned; Riviera S-Type was named Motor Trend Car of the Year. In the 1980s, Buick's lineup saw several changes including the downsizing of various models. In 1980, Lloyd Reuss was appointed as general manager and further pushed Buick into turbocharging, racing, and performance production cars, building momentum which continued a number of years after his departure in 1984 as he headed toward
7139-422: The S/T platform with the 2.8L, 3.5L and 4.2L engines (one used in 2002 and the other from 2003 and on). Buick Buick ( / ˈ b juː ɪ k / ) is a division of the American automobile manufacturer General Motors (GM). Started by automotive pioneer David Dunbar Buick in 1899, it was among the first American automobile brands and was the company that established General Motors in 1908. Before
7260-446: The THM400. Checker Motors Corporation used the Chevrolet version of the THM400 for its "A" series taxi and Marathon models until the end of production in 1982. By 1980, the relatively heavy THM400 was being phased out of usage in passenger cars in response to demand for improved fuel economy. The THM 400 was utilized in the C- and K-series (full-size) Chevrolet/GMC pickups and G-series (full-size) vans until 1990 when GM switched over to
7381-408: The Turbo- Hydramatic 440-T4 automatic with a 2.84:1 final drive ratio. This generation was noted for advanced electronic instrumentation displayed on a dash-mounted 9-inch (230 mm) CRT. The CRT controlled the vehicle's climate control system and stereo, and also supplied advanced instrumentation such as a trip computer and maintenance reminder feature. Four-wheel disc brakes were standard. With
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#17327905730547502-406: The Turbo-Hydramatic 200-4R. The low/reverse sprag (roller clutch) assembly was also shared with the 1988-04 Chrysler Torqueflite 904 (also 30, 31, 32RH) and its derivatives e.g. the A500 and 42RE. THM200/200Cs were produced until 1987. The 200-4R was introduced for the 1981 model year. Some components which were prone to failure in the THM200 were improved, and in the later 1980s, this transmission
7623-500: The assembly line on June 29 that year. In a major independent quality study, Buick ranked #2 (and top domestic) among 37 international brands and Buick City shared the top world position among automotive assembly plants. With sales of all coupes declining in the North American market, GM decided to discontinue the Riviera. 1999 was the car's last model year with production ceasing on November 25, 1998. The final 200 cars had special silver paint and trim and were denoted "Silver Arrow" models,
7744-449: The base model to $ 21,577 for the new T-Type . Downsizing also resulted in a dimensional similarity to smaller, less expensive offerings from GM. The smaller dimensions, generic styling, and lack of a V8 led to Riviera sales plummeting to 22,138 for 1986. In 1987, the last of the turbo/intercooled Regal Grand Nationals, often called the quickest American cars, were offered as well as 547 even quicker special edition '87 GNXs. It would also be
7865-407: The brands. LaCrosse and Regal were refreshed for the 2014 model year. In 2015, the all-new Cascada subcompact convertible debuted at the North American International Auto Show in Detroit. The all-new 2017 LaCrosse was shown at the Los Angeles Auto Show in November. Buick also confirmed that the Envision compact crossover would be sold in North America starting summer 2016. The Verano compact sedan
7986-460: The business to James H. Whiting , of Flint Wagon Works , in Flint, Michigan . Whiting moved Buick to Flint, to a location across the street from his factory, with the idea of adding Buick's engines to his wagons. David Buick stayed on as a manager and re-hired Walter Marr as chief engineer. The engine Buick and Marr developed for this automobile was a two-cylinder valve-in-head engine of 159 cubic inches, with each cylinder horizontal and opposed to
8107-485: The changes with the redesign included a new grille that did not open with the hood and slightly smaller exterior dimensions. Despite its somewhat smaller exterior size, it still offered similar interior room and more trunk space than the previous model. 2001 saw Buick's first entry into the crossover market with the introduction of the Rendezvous as a 2002 model. In 2003, the Buick Centieme crossover concept car commemorated Buick Motor Division's 100th anniversary. Some of
8228-425: The debut of Buick's VentiPorts . 1953 marked Buick's 50th anniversary as well as the introductions of the Buick V8 engine and the Roadmaster Skylark. In 1955, Buick had its best model year sales to date with 738,814 vehicles sold; a record that would hold until 1977. In 1957, Buick's new 364 cu. in. engine block and ball joint front suspension debuted and Roadmasters now had aluminum finned brake drums. 1959 saw
8349-475: The decision being made to discontinue the Pontiac brand instead. Since 2005, GM had gradually consolidated Buick with GMC and former Pontiac dealerships to create the current Buick-GMC network. During General Motors Chapter 11 reorganization and emergence in 2009, the company designated Buick as a "core brand", citing the division's success in China. Behind the scenes, GM began to move products originally planned for other brands to Buick. The Opel Insignia
8470-438: The doors and instrument panel, unique aluminum wheels, anti-lock brakes, chromed B-pillar moldings, specific grille and tail lamps, leather-wrapped steering wheel, electronic instrumentation, padded glove-compartment door, unique interior door panel trim, and a variety of otherwise minor changes. With its long list of standard equipment, the Park Avenue Ultra carried a higher base price than Cadillac's Sedan de Ville . The Riviera
8591-535: The engine is 20 in (51 cm) overall. From the engine/trans mating surface to the cross member mount bolt is 22.5 in (57 cm), and engine/trans surface to output shaft housing mating surface is 23.375 in (59.37 cm) overall, with the tail shaft housing typically measuring 7.625 in (193.7 mm). External dimensions are similar to a THM350 with a 9-inch tailhousing found in Chevrolet/GMC long wheelbase truck/vans and 1971-76 B-bodies (Bel Air, Impala, Caprice). Transmission fluid cooler lines on
8712-404: The establishment of General Motors, GM founder William C. Durant had served as Buick's general manager and major investor. With the demise of Oldsmobile in 2004, Buick became the oldest surviving American carmaker. Buick is positioned as a premium automobile brand, selling luxury vehicles positioned below the flagship luxury Cadillac division. Buick is one of the oldest automobile brands in
8833-539: The introduction of three new models: Electra , Invicta and LeSabre as well as a new 401 cu. in. V8 engine in the Electra and Invicta. An Electra also paced the Indianapolis 500 race that year. An Electra 225 paced the Daytona 500 race in both 1960 and 1963. In 1961, a new Fireball V6 engine was introduced and the Skylark nameplate returned as the top model of the new Special compact car line. The Buick Special
8954-451: The last year for the rear-wheel-drive Regal. General manager Ed Mertz promoted the new "Premium American Motorcars" theme which focused Buick marketing on the various qualities that made the marque famous. In 1988, Buick was the official car of the U.S. Olympic Team . The Reatta two-seater was introduced, to be followed two years later by a convertible. Also in 1988, Regal was downsized and converted to front-wheel drive. Bobby Allison won
9075-484: The need to coordinate the simultaneous release of a band and application of a clutch to make the 2-3 gear change. Owing to this feature, as well as the use of a large, multi-plate clutch to provide second gear reaction, the THM400 is able to withstand very high input torque and an enormous number of shifting cycles, as would be encountered in frequent stop-and-go driving. As a result, it has met with considerable success in commercial vehicle applications. For 1987, GM changed
9196-477: The new millennium, Buick was the leading marketer and industry leader of supercharged cars. 1991 saw the return of the Roadmaster after a 33-year absence. The Roadmaster was first offered as a wagon only and then a sedan was added for 1992. For 1992, the popular LeSabre was redesigned along the same lines as the previous year's Park Avenue . 1992 also saw the introduction of a new, redesigned Skylark. In 1993,
9317-468: The nomenclature of their Turbo Hydramatic transmissions — the THM400 was renamed '3L80' (three forward speeds, longitudinal positioning, and an arbitrary strength rating of 80, the second highest such rating assigned). The 3L80HD was introduced in 1987 as the HD unit used in passenger trucks. In 1991, a four-speed overdrive version, the 4L80-E , replaced the THM400 in Chevrolet/GMC pickups, vans, SUVs, and commercial vehicles. The 4L80E (and its successor 4L85E)
9438-644: The number one spot away from close competitors Ford , Maxwell and Olds Motor Works . Buick proclaimed themselves the largest car manufacturer in the world this year. David Buick incorporated his company as the Buick Motor Company on May 19, 1903, in Detroit , Michigan. Buick had been financed by a friend and fellow automobile enthusiast, Benjamin Briscoe , who in September 1903 sold control of
9559-465: The oil pump housing, were updated, ending with the auxiliary valve body for 700s manufactured after October 1986. In 1995, the 4L60E received a PWM -controlled lockup converter. The early designs simple on or off lockup function while the later design can regulate the apply pressure as to not feel the lock up occur. GM added a fifth solenoid to the valve body, called the PWM solenoid. In 1996, GM introduced
9680-599: The original Hydra-Matic developed by General Motors' Cadillac division in the late 1930s, the two transmissions were not mechanically related. The THM400 can be visually identified by an oil pan number four shown at General Motors Transmission Pans . First introduced for the 1964 model year under the name "Turbo Hydra-Matic" in Cadillacs and "Super Turbine" in Buicks. The following year, application expanded to Oldsmobile and Pontiac and to some full-sized Chevrolets. Many of
9801-560: The other by 180 degrees . Whiting built only a few automobiles in 1904, the Model B , before running out of operating capital, causing him to bring in William C. Durant that year as a controlling investor. Durant built a few more model B's in 1904, stepped up production for the model C in 1905, and spent the next four years turning Buick into the biggest-selling automobile brand in the US. During
9922-498: The popular crossover/SUV market in the 2010s. In January 2009, Buick unveiled the new 2010 LaCrosse sedan, an all-new styling direction that included traditional Buick cues. The market responded positively to the LaCrosse and reviews favorably compared it to luxury models such as the Lexus ES . In 2010, Buick became the fastest-growing automotive brand in America and attracted a younger customer demographic. A GM company spokesman at
10043-618: The previous generations' more traditional image. A 205 hp (153 kW) naturally aspirated 3800 V6 was standard, with a supercharged version rated at 225 hp (168 kW) and 275 lb⋅ft (373 N⋅m) available as an option. Rivieras were now assembled in Lake Orion, Michigan , riding the same Cadillac-derived G platform as the 4-door Oldsmobile Aurora . In 1996, both the Roadmaster sedan and wagon were discontinued. In 1998, after 95 years in Flint, Buick's headquarters
10164-423: The pumps themselves were made of made up of steel segments like a power steering pump. There was a steel hub and variable ratio outer ring. Because the pump segments traveled in an eccentric circle, guide rings were necessary on top and bottom of the center hub. These rings would break and cause the pump to stop pumping, as well as damaging the aluminum housings. Aftermarket hardened rings solved this problem. Unlike
10285-532: The rear-drive LeSabre Estate Wagon would soldier on largely unchanged for a few more years). The top-line LeSabre Limited became the LeSabre Limited Collectors Edition to mark the end of an era for the rear-wheel-drive coupe and sedan; engine offerings included the standard 231 V6 (sedans and coupes) or optional Olds 307 V8 or Oldsmobile 350 diesel V8. 1985 saw Buick's best model year sales to date with 915,336 vehicles sold. In 1986,
10406-667: The regular gas-engine versions. Meanwhile, sales of the Enclave crossover remained strong. In January 2012, the all-new Encore mini crossover was unveiled at the North American International Auto Show in Detroit. Also in 2012, a turbocharged version of the Verano was introduced and the Enclave was redesigned for the 2013 model year. In 2013, GM confirmed plans for a "hybrid global brand" which includes Opel /Vauxhall and Buick using more synergies between
10527-526: The return of the convertible, which had disappeared from domestic lineups in 1976. The following year, a Riviera convertible with a twin-turbo V6 paced the Indy 500. Also in 1983, Buick had its best model year to date with 810,435 vehicles sold. In 1984, Buick was the official car of the XXIII Olympiad . A reorganization split manufacturing & engineering from sales and marketing. The first pilot Buick
10648-399: The same bodystyle that first appeared at Cadillac, and four years ahead of Ford . The car was built at the all-new factory in Flint which later became known as Buick City . Buick during the 1920s made various sized vehicles, with series designations for different years, sometimes using numbers, while later years using lettered designations. One of the larger vehicles, with a straight-six, was
10769-511: The shift points and part throttle kickdown. This setup was later incorporated into the THM700R4. Because the THM-200 shared external dimensions and output shaft size and spline count with the THM-350, the THM-350 was often used to replace the weaker, less reliable THM-200 and THM-250C. The only thing which had to be added was a vacuum line to the vacuum modulator on the THM-350. Starting with
10890-476: The time said that Buick was positioned as a "premium" marque (entry-level luxury) to compete with various Acura , Infiniti , Lexus , and Volvo models, while Cadillac was aimed at the "luxury" performance segment which includes brands like BMW and Mercedes-Benz . An all-new Regal sedan, a smaller model based on the European Opel Insignia , was re-introduced for the 2011 model year after
11011-672: The total number of cars in the country. Buick now sells 80% of its production in the People's Republic of China and is a minor player in Taiwan. In 1929, as part of General Motors' companion make program , Buick Motor Division launched the Marquette sister brand, designed to bridge the price gap between Buick and Oldsmobile . Its styling featured a high peaked hood and radiator shell while its suspension used four, parallel, semi-elliptical springs with Delco-Lovejoy shock absorbers. Marquette
11132-442: The transfer case input shaft with a steel coupler sleeve that was splined to accept both shafts and couple them together. An internal snap ring inside the coupler sleeve controlled the sleeve's position on the shafts, with circular seals in the adapter sealing the transmission from the transfer case. For the 1981 model year, a lock-up torque converter was introduced which coincided with the new EMC control of most GM cars; this version
11253-468: The transmission had a 27-spline input shaft (shared with the THM200C and 2004R) which was a common failure point. In 1984, the 700R4 designed for use behind Chevrolet small block V8s received a 30-spline input shaft similar to those found on TH400 transmissions and which also used a different torque converter than its 2.8 V6 and 2.2 L4 engines. Between 1984 and 1987, internal components, from the ring gear to
11374-543: The two known surviving 1904 engines. The early success of Buick is attributed mainly to what it called the valve-in-head engine, now known as the overhead valve (OHV), engine patented by Eugene Richard and developed by Richard, Buick, and Marr. The Model F had a two-cylinder engine, an 87-inch wheelbase, and weighed 1,800 lbs. The creation of General Motors is attributed mainly to the success of Buick, so it can be said Marr and Richard's designs directly led to GM. The power train and chassis architecture introduced on
11495-404: The use of a cast iron center support to suspend the transmission's concentric shafts that join the clutch assemblies to the gear train. The center support, which is splined to the interior of the transmission's case, also provides a robust reaction point for first gear (the gear train's reaction carrier is restrained from counter-rotating the engine in first gear by a roller clutch whose inner race
11616-594: The vehicle (with the torque converter removed) by a narrow front pump spline. Note: GM had also used a Switch Pitch in the 1955–1963 Buick twin-turbine Dynaflow and the 1964-1967 two-speed Super Turbine 300 used in Buick and Oldsmobile (Pontiac's ST300 didn't get the SP). Vehicles originally equipped with the Switch Pitch ST300 can be identified by their "Park R N D L2 L1" gearshift selector. THM400 units had
11737-466: The world and is currently the oldest in the United States still active today. Autocar , founded in 1897, is the oldest motor vehicle manufacturer in the western hemisphere ; while originally an automobile maker, Autocar now builds heavy trucks. Oldsmobile , also an early automaker founded in 1897, is now defunct; Studebaker was founded in 1852, but did not begin producing automobiles until 1902; Henry Ford produced his first car in 1896 but did not start
11858-618: Was Eugene Richard, who applied for a patent in 1902 for Marr's valve-in-head ( overhead valve ) engine, which patent, number 771,095, was awarded to Richard in the name of Buick in 1904. In 1903, the third Buick automobile was made, this time by Richard, but in 1904 Buick, whose company was now called "Buick Motor Company", moved from Detroit to Flint, Michigan, and Richard stayed behind. Marr was rehired in Flint as chief engineer, to begin making automobiles in production. That year, 37 Buick automobiles were made, production increasing to 750 in 1905, 1,400 in 1906, 4,641 in 1907, and 8,820 in 1908, taking
11979-458: Was also regarded as a 'three speed Powerglide' and during its development, was generally called this. Although it uses the same torque converter as the THM400 (without variable pitch stator) it has a familial resemblance to the 1962-73 aluminum Powerglide from Chevrolet and was largely derived from the Chevrolet design. An important difference in the THM350 compared to the THM400 is that there
12100-474: Was also restyled for 1989, adding 11 inches to its overall length. In the late 1980s, the Flint-built LeSabre ranked #1 in North America and #2 in the world in a major independent quality study which eventually led Buick to change its ad slogan from "The Great American Road Belongs to Buick" to "Buick: The New Symbol for Quality in America." In 1990, the first Reatta convertible was produced. 1990
12221-420: Was also the last year for the Electra as Park Avenue, previously a trim level on the Electra, became its own model for the 1991 model year. In 1991, Buick led the industry in improvement in sales and market share. A new four-door Regal came to market for 1991, the first Regal sedan since 1984. Buick also introduced a supercharged 3.8-liter V6 in the Park Avenue Ultra. Supercharging became so popular at Buick that by
12342-445: Was another feature replacing the steering column-mounted spark lever although an emergency lever was now dash mounted. Buick scored another first in 1939 when it became the first company to introduce turn signals , which did not appear on other car brands until almost a decade later. All 1939 models also had a steering column-mounted shift lever. In the mid-1930s McLaughlin-Buicks were purchased by British monarch Edward VIII . He had
12463-561: Was available in the Series 50 with 77 brake HP. The Series 60 engine was a 272 cu. in. unit (bore 3 1/16 in., stroke 5 in.) giving 90 brake HP. Cadillac had previously introduced the Cadillac Type 51 with a flathead V8 engine in 1915 which made usage of an eight-cylinder engine a luxury feature. The Series 80 and Series 90 used a 344 cu. in. version (bore 3 5/16 in., stroke 5 in.) for 104 brake HP. Automatic vacuum-operated spark advance
12584-707: Was built in Flint, Michigan at a re-purposed factory that was known as the Flint Wagon Works . There were 37 Buicks made that year, none of which survive. There are, however, two replicas in existence: the 1904 endurance car, at the Buick Gallery & Research Center in Flint, and a Model B assembled by an enthusiast in California for the division's 100th anniversary. Both of these vehicles use various parts from Buicks of that early era, as well as fabricated parts. These vehicles were each constructed with
12705-488: Was completed in Flint. The Jackson plant continued production with Buick trucks through 1912. David Buick sold his stock upon departure in 1906, making him a wealthy man, but he died in modest circumstances 25 years later. In 1907, Durant agreed to supply motors to R. S. McLaughlin in Canada, an automaker, and in 1908 he founded General Motors . Between 1899 and 1902, two prototype vehicles were built in Detroit, Michigan by Walter Lorenzo Marr . Some documentation exists of
12826-479: Was discontinued in 1930. All Buick, Marquette, Viking , and Oldsmobile products shared the newly introduced GM B platform starting in 1926. Buick debuted two major achievements for the 1931 model year, the OHV Buick Straight-8 engine and a synchromesh transmission in all models but the Series 50. The Eight was offered in three displacements, the 220 cubic inch (bore 2 7/8 in. stroke 4.25 in.),
12947-593: Was dropped from the Buick lineup in North America in 2017. With GM selling off the Opel/Vauxhall division to Group PSA in March 2017, Buick is expected to move away from sharing the Opel model/designs upon the completion of the current generation vehicles. For 2018, Buick replaced the Regal sedan with an all-new model offering hatchback and station wagon body styles. This new Regal was the first hatchback from Buick for
13068-399: Was excessive end-play between the pump and center support and resulting wobble of the direct clutch drum due to both the end play and use of a relatively narrow bushing in the drum. This weak point can be addressed by using an extra thrust washer between the planetary gear and direct clutch to remove the end play and using a wider aftermarket bushing in the direct clutch drum. Another weak point
13189-518: Was in 1907, when the Buick Model D was introduced with a four-cylinder 255.0 cu in (4,178 cc) T-head engine, installed in the front with rear-wheel drive. This was one of the only cars with side valves that Buick ever made. In 1910, Buick introduced the Model 10 with an OHV four-cylinder engine followed in 1911, with their first closed-body car, the Buick Six , that followed
13310-543: Was known as the Super-Turbine 400. By 1973, THM units had replaced all of GM's other automatic transmissions including Chevrolet's Powerglide , Buick's Super Turbine 300 , and Oldsmobile's Jetaway . Starting in the early 1980s, the Turbo-Hydramatic was gradually supplanted by four-speed automatics, some of which continue to use the "Hydramatic" trade name. Although the Turbo Hydra-Matic name alludes to
13431-609: Was modified. The standard TH350 is still very popular in drag racing. The THM250 is a derivative of the THM350 and was introduced for 1974 in Chevrolets as a Powerglide replacement. Internally, the THM250 is a THM350 without the intermediate clutch pack and with a band adjuster similar to the Powerglide. The THM250 was usually coupled to smaller displacement engines - the largest a third generation Chevrolet inline six found in
13552-421: Was moved to Detroit. Bob Coletta, Buick general manager, saw the first Chinese Buick roll off the line at Shanghai before he turned over the top Buick job to Roger Adams. Buick Gallery and Research Center opened at Flint's Sloan Museum. A reorganization of the division split sales from marketing. In 1999, the last of nearly 16 million Buicks were built in Flint's Buick City. The last car, a 1999 LeSabre, rolled off
13673-480: Was named Motor Trend Car of the Year in 1962. Also in 1962, Wildcat was introduced as a trim level on Invicta and became its own model the following year. In 1963 the Riviera was introduced as its own model. In the mid-1960s Buick started officially selling German-built Opel cars through its North American dealerships. For 1967, radial tires became available as an option on all full-size Buicks. The 1970s saw
13794-643: Was notorious for its failure rate when used behind any engine - the largest being the Oldsmobile 5.7 L diesel. Multicase bellhousings were used - bellhousing patterns included Chevrolet V8, Buick-Oldsmobile-Pontiac, Vega 4 , GM 60 degree pattern (includes the Tech IV), and Isuzu G engine . It was GM's first transmission which used a throttle valve cable (similar in design to the Chrysler Torqueflite part throttle kickdown linkage) controlling
13915-545: Was originally intended to become the second-generation Saturn Aura , but instead became the new Buick Regal. In the 2009 J.D. Power and Associates Vehicle Dependability Study, Buick tied with Jaguar as the most dependable brand in the United States. The 2010s included the return of a classic Buick nameplate, the Buick Regal , and several new model names. The decade also saw the brand's first hatchback since 1987, its first factory convertible since 1991, and its first station wagon since 1996. Buick further expanded its presence in
14036-458: Was positioned below the Cadillac brand. To save on resources, Buick vehicles shared a common platform, called the GM A platform , that was shared with Chevrolet , Oakland , Oldsmobile , and Cadillac. At first, Buick followed the likes of Napier in automobile racing , winning the first-ever race held at Indianapolis Motor Speedway . The first full-size Buick to join the smaller Model B
14157-456: Was the Encore GX crossover which slotted in between the existing Encore and Envision. The Regal hatchback and station wagon were discontinued for the North American market in 2020. In June 2022, Buick Global Chief Duncan Aldred announced that Buick would transition its entire line-up to electric vehicles by 2030. As part of that plan, all Buick dealers would be given the opportunity to take
14278-474: Was the first Hydramatic to incorporate electronic controls — almost all of the THM400/3L80/3L80HD's components are interchangeable. Transmission fluid cooler line connections are found on the right-hand side of the THM400. The lower connection is the cooler feed, and the upper connection is the return. The case is tapped for either 1/4" National Pipe Straight NPS fittings,or 1/2" UNF fittings with
14399-605: Was the only transmission used with the Borg-Warner 1305/1339 all-wheel-drive transfer case used only in Jeeps until AMC/Jeep phased in the Chrysler Torqueflite 727 after 1979 until the FSJ platform was phased out. Additionally, the THM400 has been mated to other engines using adapter kits. THM400 transmissions are very popular in automotive competition due to their great strength. Much of this strength comes from
14520-558: Was used with high-power applications — primarily the Buick Grand National and the 1989 Pontiac Firebird Trans Am Indy 500 Pace cars. The 200-4R was configured with several different torque converters depending on the vehicle application. However, this transmission was also prone to failure (especially in D-body Cadillacs) and received improvements during its production run. The first improvement came in 1984 with
14641-494: Was usually coupled to a Mark IV engine or some high performance small blocks (e.g. the 1970 LT-1). The THM400 was never produced with a multicase bell housing . Other auto manufacturers have used the THM400 and its 4L80E successor, including Ferrari (in the 400/412 ); Jaguar / Daimler (in pre-1994 XJ12 and XJ-S coupes and their Daimler stable mates); Rolls-Royce (in 1965–1980 Silver Shadow and 1980-1992 Silver Spirit series cars, along with their Bentley stable mates);
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