Hydraulic System

Hydraulic System

Transmission Fluid Filter

The transmission fluid in the sump area at the bottom of the transaxle case flows through a transmission fluid filter to the pump assembly. The pump is bolted to the torque converter housing and is chain driven from a sprocket that is mounted on the stator support and turned by the torque converter.

Fluid Pump and Transmission Fluid Filter Components









Transmission Fluid Level

The transmission fluid level is checked with the transaxle at normal operating temperature between 82°C and 93°C (180°F and 200°F).

The transmission fluid level indicator is part of the filler cap.

The correct transmission fluid level is between the MIN and MAX in the cross hatches of the transmission fluid level indicator.

Transmission Fluid Level Indicator









Main Control

The hydraulic system has a main control assembly. The main control assembly consists of a valve body and a solenoid body. The valve body contains the hydraulic regulator and multiplex shift valves. The solenoid body contains the shift solenoids that control the hydraulic valves. The solenoid body is serviced as an assembly and can not be disassembled. The solenoid body is controlled by the PCM. The PCM has software stored in it specific to the solenoid body currently in the transaxle, called the solenoid body strategy. A new solenoid body strategy must be downloaded into the PCM any time a new solenoid body is installed.

Main Control Components










Main Control Valve Body





Valve Body





Lower Valve Body










Solenoid Body