List of GM transmissions

General Motors was an innovator of automatic transmissions, introducing the Hydra-Matic in 1940. This list includes all GM transmissions.

Automatic

Early models

The GM Hydra-Matic was a startling success, installed in the majority of GM models by 1950 and taking GM's competitors by surprise. 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.

• 1940–1967 Hydra-Matic — Oldsmobile (now the trade name for all GM automatic transmissions)
• 1948–1964 Dynaflow — Buick
• 1950–1973 Powerglide — Chevrolet (also used by Pontiac)
• 1961–1964 Roto Hydramatic — Oldsmobile/Pontiac
• 1964–1969 Super Turbine 300 — Buick/Oldsmobile/Pontiac (Oldsmobile Jetaway)

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.

• Medium-duty rear wheel drive
  • 1965–1992 TH400/3L80
  • 1968–1986 TH350/TH350C/TH250/TH250C
  • 1972–1976 TH375
  • 1976–1987 TH200/TH200C
  • 1981–1990 TH200-4R
  • 1982–1993 TH700R4/4L60
• Light-duty rear wheel drive
  • 1969–1998 TH180/TH180C/3L30 — 3-speed European/Asian model
• Transverse front wheel drive
  • 1980–1996 TH125/TH125C/3T40 — 3-speed light-duty
  • 1984–1994 TH440-T4/4T60 — 4-speed medium-duty
• Longitudinal front wheel drive
  • 1966–1981 TH425/TH325 — 3-speed
  • 1982–1985 TH325-4L — 4-speed

07:36, 3 December 2006 (UTC)66.218.35.243

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	##	-E
Number of forward gears	L=Longitudinal T=Transverse	GVWR rating	"E" for Electronic "HD" for Heavy Duty

• First-generation longitudinal
  • 1991–2001 4L30-E — 4-speed light-duty (used in BMW, 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
  • 1995– 4T40-E/4T45-E — 4-speed light-duty (used in smaller front wheel drive GM vehicles)
  • 1991– 4T65-E/4T65E-HD — 4-speed medium-duty (used in larger front wheel drive GM vehicles)
  • 1993– 4T80-E — 4-speed heavy-duty (used in large front wheel drive GM vehicles, especially Cadillac)
• Second-generation longitudinal
  • 2000– 5L40-E/5L50 — 5-speed medium-duty (used in Cadillac's Sigma vehicles)
  • 2006– 6L80/6L90 — 6-speed heavy-duty (used in GM trucks and performance cars)
  • 2007– 6L50 — 6-speed medium-duty (used in GM Sigma platform cars)
• Second-generation transverse
  • 2006– 6T70/6T75 — 6-speed medium-duty

Other automatic transmissions

• Aisin AF33 — 5-speed transverse automatic made by Aisin
• Allison 1000 Series — 6-speed longitudinal automatic made by Allison Transmission
• VTi transmission — continuously variable transmission

Manual

• Aisin AR5/MA5 — 5-speed longitudinal manual made by Aisin
• Aisin AY6 — 6-speed longitudinal manual made by Aisin
• FDF Germany F35 — 5-speed transverse manual made by FDF Germany
• FGP Germany F40 — 6-speed transverse manual made by FGP Germany
• Getrag F23 — 5-speed transverse manual made by Getrag
• Getrag 260 — 5-speed longitudinal manual made by Getrag
• New Venture Gear 3500/4500 — 5-speed longitudinal manual made by New Venture Gear
• Tremec T-56 — 6-speed longitudinal manual overdrive made by Tremec
• ZF S6-650 — 6-speed longitudinal manual made by ZF