Main Control Valve Body

Special Tools:

Disassembly





1. CAUTION: The SSC solenoid may pop out of its bore. This may damage the solenoid.

Remove the SSA and the SSC clamp and SSA and SSC solenoid.
1. Remove the solenoid clamp screw.
2. Remove the solenoid clamp.
3. Remove the SSA and SSC solenoids.





2. CAUTION: The torque converter clutch solenoid (TCC) solenoid may pop out of its bore. This may damage the solenoid.

CAUTION: The converter modulator valve may come out after the TCC solenoid. This may cause damage to the valve.

Remove the SSB, SSD, torque converter clutch solenoid, and the EPC solenoid.
1. Remove the solenoid clamp screw.
2. Remove the solenoid clamp.
3. Remove the SSB, SSD, torque converter clutch solenoid and the EPC solenoids.

3. Rotate the main control valve body so that the main control to case gasket is facing up.





4. CAUTION: Valves may come out when rotating the main control valve body.

CAUTION: The extension housing lube orifice and relief valves may stick to the separator plate.

Note: Discard the main control to case gasket.

Remove the valve body separator plate screws.
1. Remove the main control to case gasket and discard.
2. Remove the valve body separator plate screws.





5. Remove valve body separator plate and main control to Separating plate gasket.
1. Remove valve body separator plate.
2. Remove main control to separator plate gasket and discard.





6. Remove the extension housing lube orifice and the metal silver electronic pressure control (EPC) limit relief valve and spring.
1. Remove the extension housing lube orifice.
2. Remove the silver metal EPC limit relief valve and spring.





7. Remove the black plastic converter relief valve and spring.





8. Remove the electronic pressure control (EPC) limit circuit screen.





9. Remove the four main control valve body check balls.

Assembly

1. CAUTION: Do not lose parts when cleaning or servicing.

Thoroughly clean all parts in solvent and blow dry with mo1sture free compressed air.

2. CAUTION: Do not stone, file, or sand the valves. This will remove the anodized finish and may result in further main control or transmission damage.

After cleaning the main control valve body, carry out the following:
- Inspect all valve and plug bores for scoring or burrs.
- Check all fluid passages for obstructions.
- Inspect all valves and plugs for burrs.
- Inspect all mating surfaces for burrs or d1stortion.
- Inspect all springs for d1stortion.
- Check all valves and plugs for free movement in their respective bores.
- Valves and plugs, when dry, must fall from their own weight into their respective bores.
- Roll the manual valve on a flat surface to cheek for a bent condition.





3. Clean and inspect the EPC solenoid screens.





4. Remove and replace all shift solenoid O-rings.





5. Clean and inspect the torque converter clutch solenoid.





6. CAUTION: Make sure that the screen is properly located.

Clean and inspect the electronic pressure control (EPC) limit circuit screen. Install the EPC limit circuit screen.





7. Install the four main control valve body check balls.





8. CAUTION: The springs and valves are not interchangeable. Damage to transmission may occur.

Install the dark color plastic converter relief valve and spring.





9. Note: The springs and valves are not interchangeable.

Install the extension housing lube orifice and the metal silver electronic pressure control (EPC) limit relief valve and spring.
1. Install the extension housing lube orifice.
2. Install the silver metal EPC limit relief valve and spring.





10. Note: Apply petroleum jelly on the valve body separator plate to hold the main control to separator plate gasket in place.

Note: Use new separator plate main control to separator plate gasket on installation.

Install the main control valve body separator plate and gasket to the main control.
1. Position the main control valve body separator plate to the main control gasket and install separator plate to main control valve body.
2. Install, do not tighten, the three screws.





11. Install the Valve Body Aligner into the main control valve body.
1. Install the Valve Body Aligner (0.248).
2. Install the Valve Body Aligner (0.235).





12. Tighten the screws.

13. Note: Apply petroleum jelly on the separator plate surface to hold the gasket in place.

Note: Use new separator plate gasket on installation.

Install new main control to case gasket.





14. Remove the Valve Body Aligner from the main control valve body.
1. Remove the Valve Body Aligner (0.248).
2. Remove the Valve Body Aligner (0.235).
15. Rotate the main control valve body so the valve body separator plate is facing down.





16. CAUTION: All solenoid electrical connectors must face upward on installation.

Note: All shift solenoids are interchangeable.

Note: If the TCC valve came out during disassembly, use caution when installing the torque converter clutch solenoid.

Install the SSB, SSD, TCC and EPC solenoids.
1. Install the TCC solenoid.
2. Install the SUB and SSD solenoids.
3. Install the EPC solenoid.





17. CAUTION: The solenoid clamp must be installed in the TCC and EPC solenoid grooves, shift solenoid pockets and the No. 204 plug.

Install the solenoid clamp and the screw.
1. Position the solenoid clamp on the main control valve body.
2. Install the screw.





18. CAUTION: The shift solenoid electrical terminals must face up on installation.

Note: The shift solenoids are interchangeable.

Install the SSA and the SSC shift solenoids.





19. Install the solenoid clamp and the screw.
1. Position the solenoid clamp on the main control valve body.
2. Install the screw.