Overhaul - Sb4AEL: Description

NOTE: Lock-up clutch may also be know as Torque Converter Clutch (TCC).

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 SB4A-EL (Aisin Warner AW03-72LE) 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 MAZDA SB4A-EL ELECTRONIC CONTROLS article.

The TCM receives information from various input devices and uses this information to control torque converter lock-up solenoid, and shift solenoids No. 1 and 2 on transmission valve body. Solenoids are responsible for transmission shifting and torque converter lock-up.