Pressure Regulating Solenoid: Service and Repair

Removing and installing pressure regulator





A Pressure regulator 1
B Solenoid valve 3
C Solenoid valve 2
D Pressure regulator 3
E Pressure regulator 4
F Pressure regulator 2
G Solenoid valve 1

Removal





Note!
^ The solenoid valves or pressure regulators are located on the hydraulic control unit.

Note!
^ Without ATF do not start the engine and do not tow the vehicle.

1. Place oil collection pan under the transmission.





2. Unscrew ATF drain screw (1) and drain ATF.
3. Remove ATF pan (loosen screws crosswise).
4. Pull off plug connection on solenoid valve or pressure regulator.





5. Remove holder of solenoid valves or pressure regulators and take out solenoid valves.
A Fastening screws
B Holder





Note!
^ The hydraulic control unit must be removed in order to take out pressure regulator 1.
^ To remove solenoid valve 1, the guide plate for the parking lock mechanism must be removed.

A Guide plate

Installation
Install in reverse order, observing the following points:

Note!
^ Since 11/9/98, transmissions with a modified pressure regulator have been installed.
^ It is essential to note correct allocation during repair work.

1. Thinly coat toroidal sealing rings for the pressure regulators with Vaseline.
2. Do not tighten fastening screws for the parking lock mechanism guide plate with the selector lever in position "P".
3. Clean ATF pan and the four solenoids.
4. Lay all four solenoids in the seams of the ATF pan. Ensure that they are lying flat with their entire surface on the ATF pan.
5. Replace gasket for ATF pan.
6. Tighten screws of the ATF pan in diagonally opposite sequence in several stages.
7. Top up ATF.





Tightening torques