Description

DESCRIPTION

The valve body consists of a two piece aluminum valve body. Extensive electronic control effected by a microcomputer (the automatic transmission electronic control unit) over the hydraulic circuitry enables precise control over gearshifts. The valve body contains valves and pressure sensors that control fluid delivery to the torque converter clutch, forward clutches, and brake clutches.


UPPER VALVE BODY





UPPER VALVE BODY







The upper valve body contains the following components:

- 1 = Combined Drain
- 2 = Gain change solenoid valve
- 3 = Manual valve
- 4 = Modulator valve
- 5 = Shift solenoid valve No. 3
- 6 = Shift solenoid valve No. 2
- 7 = Shift valve No. 1

LOWER VALVE BODY





LOWER VALVE BODY







The lower valve body contains the following components:

- 1 = Control valve No. 3
- 2 = Shift solenoid valve No. 4
- 3 = Lockup control valve
- 4 = Control valve No. 1
- 5 = Control valve No. 2

SWITCHES AND SOLENOIDS





VALVE BODY OIL SWITCH HARNESS







There are eight pressure switches and one ATF temperature switch used to inform the Transmission Control Module (TCM) when there is pressure in various hydraulic circuits. Six of them are located on the bottom of the valve body. The remainder are located on the top of the valve body.


SWITCHES AND SOLENOIDS





VALVE BODY SOLENOID HARNESS







Eight solenoids are used to control various shift functions in the transmission. Four are located on the top of the valve body (3, 4) and the remainder are located on the bottom of the valve body.