Main Control Valve Body - Disassembly/Assembly
Main Control Valve Body
1. CAUTION: SS3 may pop out of its bore. This may damage the solenoid.
Use a 10mm socket to remove the SS1 and SS3 solenoid clamp screws. Remove the solenoid clamp and the solenoids.
2. NOTE: The TCC solenoid may pop out of its bore.
The converter modulator valve may come out after the TCC solenoid has been removed. This may damage the solenoid or converter modulator valve.
Remove the TCC, CCS, SS2 and EPC solenoid clamp screw.
3. Remove the solenoid clamp and the solenoids.
4. CAUTION: Valves may come out when rotating the main control.
Carefully rotate the main control assembly so that the control valve body-to-case gasket is facing up. Remove and discard the control valve body-to-case gasket.
5. Use a T30 Torx bit to remove the three separator plate-to-main control screws.
6. CAUTION: The extension housing lube orifice and relief valves may stick to the separator plate.
Remove the valve body separator plate.
7. Remove and discard the control valve body separator gasket.
8. Carefully remove the extension housing lube orifice.
9. Remove the electronic pressure control (EPC) limit relief valve and spring.
10. Remove the converter relief valve and spring.
11. Remove the EPC limit circuit screen.
12. Remove the four check balls.
13. CAUTION: Do not lose parts when cleaning or servicing.
Thoroughly clean all parts in solvent and blow dry with moisture-free compressed air.
14. Inspect all valve and plug bores for scores. Check all fluid passages for obstructions. Inspect the check valve for free movement. Inspect all mating surfaces for burrs or distortion. Inspect all plugs and valves for burrs or scores. Replace the control valve body if the bores are scored or if the valves are scored beyond the point of being able to be cleaned.
15. Inspect all springs for distortion. Check all valves and plugs for free movement in their respective bores. Valves and plugs, when dry, must fall from their own weight in their respective bores.
16. Roll the manual valve on a flat surface to check for a bent condition.
17. Clean and inspect the EPC limit circuit screen.
18. Clean and inspect the EPC solenoid screens.
19. Remove and replace all shift and coast clutch solenoid O-rings.
20. Clean and inspect the torque converter clutch (TCC) solenoid.
Assembly
1. CAUTION: Make sure that the screen is properly located.
Install the EPC limit circuit screen. Push down on the EPC limit circuit screen to make sure it is fully seated.
2. Install the four check balls in proper locations as shown.
3. NOTE: The springs and valves are not interchangeable.
Install the converter relief valve and spring.
4. NOTE: The springs and valves are not interchangeable.
Install the EPC limit relief valve and spring.
. Install the extension housing lube orifice.
6. Install and align the control valve body separator gasket.
7. Install the valve body separator plate. Install the separating plate-to-main control screws fingertight.
8. Install the alignment pins in the locations shown.
9. Tighten the separator plate-to-main control screws to 6-8 Nm (53-71 lb-in).
10. NOTE: Apply petroleum jelly on the separator surface to hold the gasket in place.
Install the control valve body-to-case gasket.
11. Remove the alignment pins.
12. Rotate the main control so that the separator plate is facing down.
13. CAUTION: The shift and coast clutch solenoid terminals must face upward.
NOTE: The shift and CCS solenoids are interchangeable.
NOTE: If the TCC valve came out, use caution when installing the TCC solenoid.
Install the solenoids.
14. 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. Tighten the solenoid clamp screw to 8-11 Nm (71-97 lb-in).
15. Install shift solenoids 1 and 3.
16. Install the solenoid clamp. Tighten the clamp screw to 8-11 Nm (71-97 lb-in).