Part 1

Hydraulic System

Part 1 of 2

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

Fluid Pump and Transmission Fluid Filter Components (Part 1):

Fluid Pump and Transmission Fluid Filter Components (Part 2):

Transmission Fluid Level
The transmission fluid level is checked with the transaxle at normal operating temperature between 80° C and 93° C (175° F and 200° F).

The transmission fluid level indicator is part of the transmission fluid filler tube located on the main control cover.

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

Transmission Fluid Level Indicator (Part 1):

Transmission Fluid Level Indicator (Part 2):

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 anytime a new solenoid body is installed.

Main Control Components

Main Control Components (Part 1):

Main Control Components (Part 2):

Main Control Valve Body

Main Control Valve Body:

Valve Body

Valve Body:

Lower Valve Body

Lower Valve Body (Part 1):

Lower Valve Body (Part 2):

Solenoid Body

Solenoid Body:

Hydraulic Circuits

Hydraulic Circuit Identification and Function

Hydraulic Circuit Identification and Function:

Solenoid Body Hydraulic Circuit Identification Chart

Solenoid Body Hydraulic Circuit Identification Chart:

SOLENOID BODY HYDRAULIC PASSAGES:

Cover Plate Hydraulic Circuit Identification Chart

Cover Plate Hydraulic Circuit Identification Chart:

COVER PLATE HYDRAULIC PASSAGES:

Transfer Plate Hydraulic Circuit Identification Chart (Top Side)

Transfer Plate Hydraulic Circuit Identification Chart (Top Side):

TRANSFER PLATE HYDRAULIC PASSAGES (TOP VIEW):

Transfer Plate Hydraulic Circuit Identification Chart (Bottom Side)

Transfer Plate Hydraulic Circuit Identification Chart (Bottom Side) (Part 1):

Transfer Plate Hydraulic Circuit Identification Chart (Bottom Side) (Part 2):

TRANSFER PLATE HYDRAULIC PASSAGES (BOTTOM VIEW):

Center Spacer Plate Hydraulic Circuit Identification Chart

Center Spacer Plate Hydraulic Circuit Identification Chart (Part 1):

Center Spacer Plate Hydraulic Circuit Identification Chart (Part 2):

CENTER SPACER PLATE HYDRAULIC PASSAGES:

Valve Body Hydraulic Circuit Identification Chart (Top Side)

Valve Body Hydraulic Circuit Identification Chart (Top Side) (Part 1):

Valve Body Hydraulic Circuit Identification Chart (Top Side) (Part 2):

VALVE BODY HYDRAULIC PASSAGES (TOP VIEW):