Hydraulic System
Hydraulic SystemFilter
Fluid in the sump area at the bottom of the transaxle case flows through a 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.
A thermostatic fluid control valve prevents foaming of fluid by maintaining a sump level below the rotating components.
Fluid Pump and Filter Components
Fluid Pump and Filter Components:
The thermostatic fluid control valve stores fluid in the area of the main control when the fluid expands due to temperature. When the fluid is cold, the valve allows more fluid from the main control area to return to the sump.
The transmission fluid level check is correctly carried out when the transaxle is at normal operating temperature.
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 shift valves. The solenoid body contains the shift solenoids that control the hydraulic shift 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 anytime a new solenoid body is installed.
Main Control Components:
Main Control Valve Body:
Lower Valve Body (Part 1):
Lower Valve Body (Part 2):
Lower Valve Body (Part 3):
Solenoid Body:
