Unit Repair Manual
DESCRIPTIONGeneral Description
The A131L and A132L automatic transaxle described are 3-speed Lock-up designs developed exclusively for use with transversely-mounted engines.
General Specifications
OPERATION
1. Function Of Components
Power from the engine transmitted to the input shaft via the torque converter clutch is then transmitted to the planetary gears by the operation of the clutch.
By operation of the brake and one-way clutch, either the planetary carrier or the planetary sun after gear are immobilized, altering the speed of revolution of the planetary gear unit.
Shift change is carried out by altering the combination of clutch and brake operation.
Each clutch and brake operates by hydraulic pressure; gear position is decided according to the throttle opening angle and vehicle speed, and shift change automatically occurs.
The conditions of operation for each position is shown in the following illustration:
2. Hydraulic Control System
The hydraulic control system is composed of the oil pump, the valve body, the accumulators, the clutches and brakes, as well as the fluid passages which connect all of these components. Based on the hydraulic pressure created by the oil pump, the hydraulic control system governs the hydraulic pressure acting on the torque converter clutch, clutches and brakes in accordance with the vehicle driving conditions.