Automatic Transmission/Transaxle: Description and Operation

DESCRIPTION

General



The A43D is a 4-speed automatic transmission. The A43D automatic transmission is mainly composed of a Torque Converter Clutch (TCC), an overdrive (O/D) planetary gear unit, a 3-speed planetary gear unit and a hydraulic control system.


OPERATION

Operating Conditions








Function of Components
The conditions of operation for each gear position are shown in the illustrations.








Hydraulic Control System



The hydraulic control system is composed of the oil pump, the valve body, the governor body, the accumulators, the clutches and brakes as well as the fluid passage which connect all of these components. Based in the hydraulic pressure created by the oil pump, the hydraulic control system governs the hydraulic pressure acting on the torque converter, clutches and brakes in accordance with the vehicle driving conditions.