Removing and Installing Hydraulic Control Unit

Removing and installing hydraulic control unit





Removing and installing hydraulic control unit

Note!
^ Do not let engine run with the ATF pan removed or without ATF filling.

Removal





1. Unscrew ATF drain screw (1) and drain ATF fluid.
2. Remove ATF pan. (Loosen screws in diagonally opposite sequence).





3. Remove ATF filter.
4. Disconnect plug connections for transmission speed sensors and solenoid valves.





5. Unscrew fastening screws for hydraulic control unit.

Note!
^ Only the marked screws may be unscrewed.
^ The function of the hydraulic control unit can be impaired if other screws are loosened.





6. Disconnect plug connections from the pressure regulator and sensor for transmission input speed at the rear of the hydraulic control unit and detach the cables at the housing.

Installation





Install in reverse order, observing the following points:

Note!
^ Always pay attention to the allocation when replacing the hydraulic control unit.

1. Carefully put on hydraulic control unit and insert the pin of the detent disc (1) into the groove of the selector valve (2).





2. First tighten screws for hydraulic control unit (arrows) hand tight. Then tighten to 8 Nm (6 ft. lbs.) from inside outwards.
3. Thinly coat gasket on the suction collar of the ATF filter with Vaseline and install filter.
4. Replace gasket for ATF pan.
5. Clean all four magnets in the beads of the ATF pan and ensure there is contact over the full area of the ATF pan.
6. Tighten screws of the ATF pan in diagonally opposite sequence in several stages.
7. Fill in ATF.





Tightening torques