Overhaul - Aw03-72LE: Description

Transmission consists of a lock-up torque converter, oil pump, valve body assembly, 3 clutch assemblies, 3 planetary gear sets, 4 clutch style brakes and 3 one-way clutches.

The Geo, Kia and Suzuki 4-speed OD transmission is electronically controlled. Transmission shifting and torque converter lock-up are controlled by the Transmission Control Module (TCM), 2 shift solenoids and a lock-up solenoid. For electronic diagnosis, see appropriate ELECTRONIC CONTROLS article.

The TCM receives information from various input devices and uses this information to control torque converter lock-up solenoid, and both shift solenoids No. 1 and 2 on transmission valve body. Solenoids are responsible for transmission shifting and torque converter lock-up. A mode switch is mounted on console and is used to change TCM shift program from Economy to Power.