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List of GM transmissions

From Wikipedia, the free encyclopedia

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

Automatic transmissions

Early models

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.

Turbo-Hydramatic

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

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)
  • 2008–present: 6T30/6T40/6T45 — 6-speed light-duty
  • 2006–present: 6T70/6T75 — 6-speed medium-duty
  • 2016–present: 9T50/9T65 Hydra-Matic – 9-speed[5]

Hybrid and PHEV

Other automatics

Future

Manual transmissions

Longitudinal transmissions

  • Aisin AR5/MA5 — 5-speed longitudinal manual made by Aisin
  • Aisin AY6 — 6-speed longitudinal manual made by Aisin
  • Getrag 260 — 5-speed longitudinal manual made by Getrag
  • Muncie M20 — 4-speed longitudinal wide ratio manual transmission made by GM at their Muncie, Indiana factory
  • Muncie M21 — 4-speed longitudinal close ratio manual transmission made by GM at their Muncie, Indiana factory
  • Muncie M22 — 4-speed longitudinal heavy duty close ratio manual transmission made by GM at their Muncie, Indiana factory
  • Saginaw M26/27 transmission — 3 and 4-speed longitudinal light duty (less than 300 hp wide ratio manual transmission made by GM at their Saginaw, Michigan factory
  • Muncie M62/M64 — 3-speed longitudinal transmission made by GM
  • Muncie SM420 — 4-speed manual used up to 1967, very similar to sm 465 except small changes to gear ratios and location of reverse.
  • New Process Gear NP435 - 4-speed longitudinal transmission used in a select handful of 67-72 GM pickups
  • New Process Gear A833 RPO MY6 or MM7 — 4-speed longitudinal A833 overdrive transmission made by New Process Gear for early to mid 1980s General Motors Light Trucks
  • Muncie SM465 — 4-speed longitudinal manual used in 68- 91 Chevy 1/2 3/4 and 1 ton trucks
  • New Venture Gear NV1500 — 5-speed longitudinal manual made by New Venture Gear
  • New Venture Gear 3500/4500 — 5-speed longitudinal manual made by New Venture Gear
  • Borg-Warner T-10 transmission — 4-speed longitudinal manual currently made by Richmond Gear; originally made by Borg-Warner
  • Tremec T-5 — 5-speed longitudinal manual currently made by Tremec; originally made by Borg-Warner
  • Borg-Warner T-50 transmission — 5-speed longitudinal manual - used by GM in its H Body cars and a few other limited light duty applications from 1976 to 1978;
  • Tremec T-56 — 6-speed longitudinal manual overdrive made by Tremec; formerly made by Borg-Warner
  • Tremec TR-6060 — 6-speed longitudinal manual overdrive made by Tremec
  • ZF S6-650 — 6-speed longitudinal manual made by ZF Friedrichshafen
  • Tremec TR-6070 — 7-speed longitudinal manual overdrive made by Tremec

Transverse Transmissions

  • 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

References

  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". http://www.thetruthaboutcars.com/. 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.
This page was last edited on 15 October 2020, at 04:41
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