Introduction The GM 4L75E is a Chevrolet Performance four-speed electronically controlled automatic transmission designed for high-output longitudinal powertrain installations. The version covered here is the SuperMatic 4L75-E, GM part number 19368615, rated by Chevrolet Performance for up to 650 lb-ft of engine torque. The 4L75E is closely related to the 4L65E and 4L70E, but it…
Introduction The GM 200-4R is a four-speed rear-wheel-drive automatic overdrive transmission used across a wide range of General Motors passenger-car applications during the 1980s. GM service documentation identifies the unit under the MW9 transmission code. Its architecture combines a three-element torque converter with a torque-converter clutch, a compound planetary gearset, a separate overdrive section, multiple…
Introduction The GM 4L60 is a longitudinal four-speed automatic transmission from the Hydra-Matic lineage that began as the THM700-R4, commonly shortened to 700-R4. General Motors changed the transmission designation to 4L60 for the 1989 model year, but the hydraulically controlled 4L60 remained fundamentally different from the later electronically shifted 4L60-E. That distinction is important for…
Introduction The GM 700-R4 is a longitudinal four-speed automatic transmission developed by General Motors for rear-wheel-drive and four-wheel-drive vehicles. Later GM documentation also identifies the same hydraulically controlled unit as the 4L60, including the designation “700-R4 (4L60).” The electronically shifted 4L60-E is a different control architecture and should not be treated as interchangeable with the…
Introduction The GM Turbo Hydra-Matic 400, commonly abbreviated TH400 or THM400, is a three-speed longitudinal automatic transmission introduced in verified Buick applications for the 1964 model year under the Super Turbine 400 name. General Motors later incorporated the unit into its revised transmission naming system as the Hydra-Matic 3L80, while the heavier-duty THM475 became the…
Introduction The GM Turbo Hydra-Matic 350, commonly abbreviated TH350 or THM350, is a three-speed longitudinal automatic transmission used in rear-wheel-drive General Motors applications. It is a conventional hydraulically controlled transmission built around a torque converter, planetary gearing, multiple-disc clutch packs, one-way clutches, a band, a governor, a vacuum modulator and a mechanical detent cable. The…