3T40 Transmission parts, repair guidelines, problems, manuals
Transmission general data
|Number of gears||Transmission Type||Drive||Torque (Nm)||ATF (full capacity) L||ATF (change) L||ATF type|
The 3-speed automatic transmission GM 3T40 named as Turbo-Hydramatic 125C was installed on FWD cars with engine capacity from 2 up to 3.1 liters. The first modifications of this transmission did not have the torque converter, later versions (1995) had an electronic control and letter E was added to a new name GM 3T40E. The most significant modification was introduced in 1984. Since then sets of gaskets and seals have not been changed.
What are you looking for?
Overhaul Kit | Friction Kit | Friction | Steel Plate | Steel Kit | Band | Solenoid Kit | Solenoid EPC | Solenoid TCC | Pump | Shaft | Drum | Valve body | Torque converter | Hub | Piston | Piston Kit | Planetary Gear | Filter | Gasket | Bushing | Seal | Bearing | Pressure Plate | Stator | Differential | Retainer | Inhibitor Switch | Instruction manual | TOOLS & ACCESORIES | Sensor
Which cars run with this gearbox?
|Buick||CENTURY/CENTURY WAGON||95-96||3 SP FWD||L4 2.2L|
|Buick||SKYLARK||95||3 SP FWD||L4 2.3L|
|Chevrolet/GM||BERETTA/CORSICA||95-96||3 SP FWD||L4 2.2L|
|Chevrolet/GM||CAVALIER||95-01||3 SP FWD||L4 2.2L|
|Chevrolet/GM||LUMINA||95||3 SP FWD||V6 3.1L|
|Oldsmobile||ACHIEVA||95||3 SP FWD||L4 2.3L|
|Oldsmobile||CUTLASS CIERA/CRUISER||95-96||3 SP FWD||L4 2.2L|
|Oldsmobile||SILHOUETTE||95||3 SP FWD||V6 3.1L|
|Pontiac||GRAND AM||95||3 SP FWD||L4 2.3L|
|Pontiac||SUNFIRE||95-02||3 SP FWD||L4 2.2L|
|Pontiac||TRANS SPORT||95||3 SP FWD||V6 3.1L|
Technical issues and repair guidelines
The GM 3T40 is a reliable, simple transmission that operates over 300 thousand kilometers. It served as a prototype for the 4-speed family 4T40E -4T60E.This transmission rarely gets in repair services. The main spare parts ordered for repair of this transmission are the repair kit of gaskets and seals (Overhaul kit) or a complete Masterkit (with clutches and seals).