Electrohydraulic Unit

ELECTROHYDRAULIC UNIT

DISASSEMBLY





1. Remove the electrohydraulic control unit from the vehicle.
2. Remove the solenoid caps (1, 2).
3. Unscrew the bolts (3, 4).

Note: Pay attention to the different lengths of the Torx socket bolts.

4. Remove the leaf springs (5).
5. Withdraw the solenoid valves (6 - 11) from the shift plate (13).

Note: Check O-rings on solenoid valves for damage and replace if necessary.

6. Bend away the retaining lug on the stiffening rib on the transmission oil temperature sensor.
7. Remove the electrohydraulic control module (12) from the shift plate (13).

Note: Pay great attention to cleanliness for all work on the shift plate. Fluffy cloths must not be used. Leather cloths are particularly good. After dismantling, all parts must be washed and blown out with compressed-air, noting that parts may be blown away.





8. Unbolt the leaf spring (5).
9. Unscrew the bolts (1).
10. Remove the valve housing (2) from the valve body (4).





11. Remove the strainers (1) for the modulating pressure and shift pressure control solenoid valves from the valve housing.
12. Note the locations of the major shift valve group components for assembly reference.





13. Remove the strainer in the inlet to torque converter lock-up control solenoid valve (1).





14. Remove the sealing plate (3).

Note: A total of 12 valve balls are located in the valve body, four made from plastic (4) and eight from steel (1, 3).





15. Note the location of all check balls (1, 3, 4) and the central strainer (2) for reinstallation. Remove all check balls (1, 3, 4) and the central strainer (2).
16. Remove the screws holding the side covers to the valve body and valve housing.





17. Remove all the valves and springs from the valve body (1). Check all valves for ease of movement and shavings.





18. Remove all of the valves and springs from the valve housing (2). Check all valves for ease of movement and shavings.

Note: The sleeves and pistons of the overlap regulating valves must not be mixed up.

19. Remove the pressure supply valve from the valve body.