General Motors is an innovator of automatic transmissions, introducing the Hydra-Matic in 1940. 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. 1940–1967 Hydra-Matic — Oldsmobile (now the trade name for all GM automatic transmissions) 1948–1963 Dynaflow — Buick 1950–1973 Powerglide — Chevrolet (also used by Pontiac, Holden, Vauxhall and Opel) 1968-1971 Torquedrive- Chevrolet ( Camaro and Chevy II, Nova. Manually shifted on Column. ) 1957–1961 Turboglide — Chevrolet (V8 models only, except Corvette) 1958–1959 Flightpitch — Buick 1961–1963 Dual Path Turbine Drive — Buick 1961–1964 Roto Hydramatic — Oldsmobile/Pontiac (also used by Holden, Vauxhall and Opel) 1964–1969 Super Turbine 300 — Buick/Oldsmobile/Pontiac (Oldsmobile Jetaway) 1968–1969 Torquedrive — Chevrolet (manually column shifted 2 speed automatic, 6 cyl only) 1956-1964 4 speed Controlled coupling HydraMatic, also known as Cadillac 315 or P 315 HydraMatic, Oldsmobile Jetaway, Pontiac Super HydraMatic. TempestTorque, ( Pontiac) a two speed based on Powerglide, but having the added feature of " Split Torque " dividing the engine power between mechanical connection and the torque converter in high gear. 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. In Argentina, the Turbo Hydra-Matic was available on some models of the 1969-1978 Chevrolet "Chevy," essentially the 1968 U.S. Nova, but was marketed as the "Chevromatic." Heavy-duty rear wheel drive 1971–1994 3L80HD (heavy duty version of TH400) Medium-duty rear wheel drive 1964–1992 Super Turbine 400/TH400/3L80 1969–1986 TH350/TH350C/TH375B/TH250/TH250C 1972–1976 TH375 — Light duty version of TH400 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. Also manufactured and used by Holden as the Trimatic transmission. Transverse front wheel drive 1980–1999 TH125/TH125C/3T40 — 3-speed light-duty 1984–1994 TH440-T4/4T60 — 4-speed medium-duty 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