Turbo-Hydramatic 125
The 3-speed Turbo-Hydramatic 125 was introduced in 1980 and produced through 2001. It carried over some parts from the light-duty Turbo-Hydramatic 200 and 350, but was generally a new design. The 125 was renamed 3T40 later, following GM's new naming convention. After the 1995 introduction of the electronically controlled 4T40-E 4-speed, the 3T40 was gradually phased out. Applications: * 1982–1996 A-body * 1980–1985 X-body * 1982–2001 J-body * 1990-1993Turbo-Hydramatic 125 C
This was a later model of the 125 that debuted for 1982 and included a torque converter clutch or TCC. The TCC acts similar to a clutch in a manual transmission vehicle, in that at speeds above 35 MPH a combination of engine vacuum- and temperature-sensing valves, and a dedicated brake switch - and in later models an ECU - activated aTurbo-Hydramatic 125 C AWD
For the 1988 model year, the Pontiac Division of GM utilized a THM 125C modified to accommodate a full-time All-Wheel-DriveTurbo-Hydramatic 440-T4
The model THM440T4 indicates Turbo HydraMatic Model 440, Transversely Mounted, 4 Speed Fully Automatic transaxle. A 4-speed transaxle which replaced the 125, was created for the 1985–1986See also
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