AW-4 4-Speed

Fig. 1 Cross-Sectional View Of Automatic Transmission:

The AW-4 is a four speed, electronically controlled automatic transmission, Fig. 1, that incorporates a lock-up torque converter, three planetary gearsets, clutch and brake units, hydraulic accumulators and a valve body controlled by electrical solenoids and a Transmission Computer Unit (TCU). Vehicle speed and throttle position are monitored by the TCU, which then appropriately adjusts the valve body solenoids.