Main Control Valve Body Disassembly / Assembly

DISASSEMBLY / ASSEMBLY









DISASSEMBLY NOTE

CAUTION: The SS3 solenoid may pop out of its bore. This may damage the solenoid.





1. Remove the SS1 and the SS3 clamp and SS1 and SS3 solenoid.
(1). Remove the solenoid clamp bolt.
(2). Remove the solenoid clamp.
(3). Remove the SS1 and SS3 solenoids.

CAUTION:
- The torque converter clutch solenoid clutch (TCC) solenoid may pop out of its bore. This may damage the solenoid.
- The converter modulator valve may come out after the TCC solenoid. This may cause damage to the valve.





2. Remove the SS2, CCS (4R44E only), SS4 (5R55E only) TCC solenoid, and the EPC solenoid.
(1). Remove the solenoid clamp bolt.
(2). Remove the solenoid clamp.
(3). Remove the SS2, CCSISS4, TCC and EPC solenoids.
3. Rotate the main control valve body so that the main control to case gasket is facing up.

CAUTION:
- Valves may come out when rotating the main control valve body.
- The extension housing lube orifice and relief valves may stick to the separator plate.

4. 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.

NOTE: Discard all main control to case gaskets.

5. Remove valve body separator plate and main control to case gasket.




(1). Remove valve body separator plate.
(2). Remove main control to case 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 EPC limit circuit screen.





9. Remove the (4) main control valve body check balls.


ASSEMBLY NOTE
1. Thoroughly clean all parts in solvent and blow dry with moisture free compressed air.

CAUTION:
- Do not lose parts when cleaning or servicing.
- Do not stone, file, or sand valves. This will remove the anodized finish and may result in further main control or transmssion damage.

2. After cleaning the main control valve body, perform the following:
(1). Inspect all valve and plug bores for scoring or burrs.
(2). Check all fluid passages for obstructions.
(3). Inspect all valves and plugs for burrs.
(4). Inspect all mating surfaces for burrs or distortion.
(5). Inspect all springs for distortion.
(6). 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.
(7). Roll the manual valve on a flat surface to check for a bent condition.





3. Clean and inspect the EPC solenoid screens.





4. Remove and replace all shift solenoid 0-rings.





5. Clean and inspect the TCC solenoid.

CAUTION: Make sure that the screen is properly located.





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





7. Install the (4) main control valve body check balls.

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





8. Install the dark color plastic converter relief valve and spring.
9. 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.





NOTE: The springs and valves are not interchangeable.

NOTE:
- Apply petroleum jelly on the valve body separator plate to hold the main control to case gaskets in place.
- Use new separator plate main control to case gaskets on installation.





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





11. Install SSTs into the main control valve body.
(1). Install large SST (.248 DIA).
(2). Install small SST (.235 DIA).





12. Tighten the separator plate screws.
13. Install new main control to case gasket.

NOTE:
- Apply petroleum jelly on the separator plate surface to hold the gaskets in place.
- Use new separator plate gaskets on installation.





14. Remove the SSTs from main control valve body.
(1). Remove large SST 49 UN01 140.
(2). Remove small SST 49 UN01 139.





15. Rotate the main control valve body so the valve body separator plate is facing down.

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

16. Install the SS2, CCS (4R44E only), SS4 (5R55E only), TCC and EPC solenoids.




(1). Install the TCC solenoid.
(2). Install the SS2 and CCS/SS4 solenoids.
(3). Install the EPC solenoid.

NOTE:
- All shift solenoids are interchangeable.
- If the TCC valve came out during disassembly, use caution when installing the TCC solenoid.

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

17. Install the solenoid clamp and the solenoid clamp bolt.
(1). Position the solenoid clamp on the main control valve body.
(2). Install the solenoid clamp bolt.

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





18. Install the SS1 and the SS3 shift solenoids.

NOTE: The shift solenoids are interchangeable.





19. Install the solenoid clamp and the solenoid clamp bolt.
(1). Position the solenoid clamp on the main control valve body.
(2). Install the solenoid clamp bolt.