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List of GM transmissions
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General Motors is an innovator of automatic transmissions, introducing the Hydra-Matic in 1940.[1] This list includes some GM transmissions.

Automatic transmissions[edit]
Early models[edit]
The GM Hydra-Matic was a success and installed in the majority of GM models by 1950. Through the 1950s, all makers were working on their own automatic transmission, with four more developed inside GM alone. All of GM's early automatic transmissions were replaced by variants of the Turbo-Hydramatic by the 1970s.

The Turbo-Hydramatic was used by all GM divisions, and formed the basis for the company's modern Hydramatic line. The basic rear-wheel drive Turbo-Hydramatic spawned two front-wheel drive variants, the transverse Turbo-Hydramatic 125, and the longitudinal Turbo-Hydramatic 425. A third variant was the light-duty rear wheel drive Turbo-Hydramatic 180 used in many European models.

Heavy-duty rear wheel drive
  • 1971–1994 3L80HD (heavy duty version of TH400)
Medium-duty rear wheel drive
Light-duty rear wheel drive
  • 1969–1998 TH180/TH180C/3L30 — 3-speed European/Asian model. Also manufactured and used by Holden as the Trimatic transmission.
Transverse front wheel drive
Longitudinal front wheel drive
  • 1966–1978 TH425 — 3-speed
  • 1979–1981 TH325 — 3-speed
  • 1982–1985 TH325-4L — 4-speed
Electronic Hydra-Matics[edit]
The next-generation transmissions, introduced in the early 1990s, were the electronic Hydra-Matics based on the Turbo-Hydramatic design. Most early electronic transmissions use the "-E" designator to differentiate them from their non-electronic cousins, but this has been dropped on transmissions with no mechanical version like the new GM 6L80 transmission.

Today, GM uses a simple naming scheme for their transmissions, with the "Hydra-Matic" name used on most automatics across all divisions.

3/4/5/6 L/T ## -Elll
Number of forward gears L=Longitudinal
T=Transverse GVWR rating "E" for Electronic
"HD" for Heavy Duty
First-generation longitudinal (Rear Wheel drive)
  • 1991–2001 4L30-E — 4-speed light-duty (used in BMW, Cadillac, Isuzu, and Opel cars)
  • 1992– 4L60-E/4L65-E — 4-speed medium-duty (used in GM trucks and rear-wheel-drive cars)
  • 1991– 4L80-E/4L85-E — 4-speed heavy-duty (used in GM trucks)
First-generation transverse (Front Wheel drive)
  • 1995–2010 4T40-E/4T45-E — 4-speed light-duty (used in smaller front wheel drive GM vehicles)
  • 1991–2010 4T60-E/4T65-E/4T65E-HD — 4-speed medium-duty (used in larger front wheel drive GM vehicles)
  • 1993–2010 4T80-E — 4-speed heavy-duty (used in large front wheel drive GM vehicles, only with Cadillac NorthStar V8.
Second-generation longitudinal (Rear Wheel drive)
*This transmission is part of a joint-venture between General Motors and Ford Motor Company to split development of two transmissions, a longitudinal 10-speed and transverse 9-speed. Ford led the design of the 10-speed transmission, as well as filing the design patents for said transmission. According to an official report by the SAE (Society of Automotive Engineers) the design of the 10-speed gearbox is essentially all Ford, while GM was responsible for designing the 9-speed 9T transverse automatic gearbox. As part of their joint-venture, Ford will let GM use the 10-speed transmission with rights to modify and manufacture it for their own applications. In-exchange for Ford's 10-speed transmission, General Motors will let Ford use its 9-speed transmission for front-wheel drive applications; Ford ultimately declined use of the 9T.[2] [3][4]

Second-generation transverse (Front Wheel drive)
Hybrid and PHEV[edit]
Other automatics[edit]
Manual transmissions[edit]
Longitudinal transmissions[edit]
Transverse Transmissions[edit]
  • F23 — 5-speed transverse manual manufactured by Getrag
  • F35 — 5-speed transverse manual manufactured by Saab in Gothenburg, Sweden
  • F40 — 6-speed transverse manual manufactured by FGP Germany
  • Getrag 282 — 5-speed transverse manual designed by Getrag and manufactured by Muncie Getrag
  • Getrag 284 — 5-speed transverse manual designed by Getrag and manufactured by Muncie Getrag
  • MP2/MP3 — 5-speed manual developed by Saturn for use in the S-Series from 1991-2002
See also[edit]
  1. ^ "Hydra-Matic History: The First Automatic Transmission". Ate Up With Motor. 2010-05-29. Retrieved 2014-01-15.
  2. ^ "Exclusive: An Inside Look At Ford's New 10 Speed Transmission". Retrieved 2015-03-16. External link in |publisher= (help)
  3. ^ Brooke, Lindsay. "Ford and GM finally consummate 9- and 10-speed joint development". articles.sae. SAE International. Retrieved 20 March 2016.
  4. ^ "Ford passes on GM's 9-speed automatic transmission". Retrieved 2018-11-12.
  5. ^ Panait, Mircea. "GM Hydra-Matic 9T50 Transmission Confirmed for Chevrolet Cruze, Malibu, Equinox". autoevolution. Retrieved 2016-12-07.
  6. ^ "GM Service Insights, pg 23" (PDF). Archived from the original (PDF) on 2019-01-09. Retrieved 2019-07-16.
  7. ^ "GM Service Insights, pg 23" (PDF). Archived from the original (PDF) on 2019-01-09. Retrieved 2019-07-16.
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The 200R4 & Turbo 400 Have exact Blueprint Trans mount pad location distance Grumpy.
Difference is the TH400 Tailshaft extension housing length.
Moot Minor obsticale to overcome.
Will bolt right in place a TH400 To Replace the much weaker 200R4.
Looking at the Photo provided by You Grumpy the 200R4 has a wider case than a TH400.
Will fit with room to spare a TH400.
The Trans tunnel in the 63 Pontiac Gp is Dinky.
Flat floor design to give huge room sitting down.
The Slim Jim Roto Hydromatic 1961-64 used in Catalina and Grand Prix.
Weak trans.
Just had to bump the floor for lower Bellhousing.
Make my own crossmember from original.
Fit right in the TH400.
Lower ears on the TH400 can be removed.
I chose not too.
To run a dust cover back then.
Gain 2 -3 inches more room if lower ears cut off.
I run no dust cover today.
Not needed for Hotrodding.