Hydraulic System

Hydraulic System


Fluid Pump

For component location, refer to Transmission Assembly.

The fluid pump provides the fluid pressure required to charge the torque converter, main control assembly, transmission cooling system, lubrication system and apply devices.

The fluid pump is a positive displacement, gear and crescent type pump.

The fluid pump is driven by the torque converter hub.


Filter

For component location, refer to Transmission Assembly.

All transmission fluid drawn from the transmission fluid pan by the fluid pump passes through the transmission fluid filter.

The transmission fluid filter and its accompanying seals are part of the transmission fluid path from the sump (pan) to the fluid pump.

The transmission fluid filter has a bypass section which allows transmission fluid vented at the main regulator valve to be recirculated to the fluid pump, without passing through the transmission fluid filter.


Main Control

For component location, refer to Transmission Assembly.

The main control valve body and related components are part of the pressure side of the hydraulic system.

The main control valve body consists of the solenoids, the valve body assembly and the separator plate.

These components combine to convert electrical signals into hydraulic actions.

All valves in the main control assembly are anodized aluminum and cannot be sanded, filed or dressed in any other way. Any damage to the valves that prevents or restricts their movement, requires installation of a new main control valve body.