Control Valve Assembly

CONTROL VALVE ASSEMBLY






REMOVE OR DISCONNECT
1. Rotate transmission bottom pan surface up and lock in place.
2. Wire harness assembly (34) connectors from components.

IMPORTANT
- If the wire harness assembly does not need servicing, it is not necessary to remove it from the case.
- Use a cap to cover electrical pin at case connection.

3. Six bolts (76) using 8 mm socket, and transmission fluid pressure switch assembly (40).

NOTICE: Be sure five O-rings are attached to transmission fluid pressure switch assembly.

4. Twenty-one bolts (35) using 10 mm socket, from valve body assembly, manual detent spring and roller assembly (41).
5. Three wiring clamps (33), fluid level indicator stop (43), one bolt (36) using 10 mm socket, lube pipe (39), lube pipe retainer (37) and clamp (38).
6. Control valve assembly (44) including the accumulator housing assembly (51), valve body gaskets (45 and 48), spacer plate (46) and accumulator gasket (47).
7. Manual valve (319) from control valve assembly (44) to prevent any damage.
8. Checkballs (54) from case passages.

NOTICE: Do not use a magnet. It could cause checkball(s) to be magnetized causing metal particles to stick to the ball.

9. Pulse Width Modulated (PWM) solenoid screen (75).

INSPECT
- Screen PWM solenoid (75), replace if necessary.

DISASSEMBLE

Control Valve Assembly:

- Control valve assembly.
A. Position as shown on a clean surface.
B. Remove blind hole retainer pins with a drill bit.

CAUTION: Some valves are under pressure - cover the bores while removing the retaining pins or personal injury could result.

C. Remove valve trains, shift solenoids (311 and 313), PCS (320), PWM solenoid (323), PCS screen (302) and shift solenoid filter (317).
D. Valves, springs, bushings and pistons must be laid out on a clean surface.

CLEAN
- All valves, springs, bushings, pistons, control valve body and accumulator housing in clean solvent.
- Dry using compressed air.

INSPECT
1. All valves, pistons and bushings for:
- Porosity.
- Scoring.
- Nicks.
- Scratches.

2. Pistons for:
- Seal damage.

3. Springs for:
- Damaged or distorted coils.

4. Valve body casting and accumulator housing for:
- Porosity.
- Cracks.
- Interconnected passages.
- Damaged machined surfaces.

5. Solenoid connectors and filter (317).
6. PCS (Pressure Control Solenoid) screen (302).