Main Control Valve Body

Main Control Valve Body

Removal

1. With the vehicle in NEUTRAL, position it on a hoist.

2. Loosen, but do not remove the transmission fluid pan bolts and allow the transmission fluid to drain. Once the transmission fluid has drained, remove the bolts. Remove the transmission fluid pan and gasket.





3. Pull down evenly and remove the transmission fluid filter and seal.





4. Clean and inspect the transmission fluid pan, gasket and magnet.





5. NOTICE: Carefully pry up on the locking tabs to disconnect the solenoids. Disconnect the transmission internal harness from the solenoids.

Disconnect the transmission internal harness from the solenoids.

1. Disconnect Shift Solenoid A (SSA) and Shift Solenoid B (SSB).

2. Disconnect the Torque Converter Clutch (TCC).

3. Disconnect the Electronic Pressure Control (EPC) solenoid.

4. Disconnect the transmission internal harness connector.

5. Disconnect the Transmission Fluid Temperature (TFT) sensor.





6. Remove the manual control valve detent lever bolt and spring.





7. Remove the bolt and EPC solenoid bracket.





8. Remove the 23 main control valve body bolts.





9. Remove the main control valve body and discard the pump outlet screen.





Installation

1. NOTE: Make sure that the drive pin of the manual valve detent lever assembly engages the manual valve in the correct location prior to installing the bolts.

Position the main control valve body gasket and main control valve body onto the transmission case using 2 bolts as a guide.





2. NOTE: The main control valve body bolts will be tightened in later steps.

Loosely install the 11 long main control valve body bolts.





3. NOTE: Lubricate the EPC solenoid O-rings with automatic transmission fluid.

Position the EPC solenoid bracket and loosely install the bolt.





4. NOTE: The main control valve body bolts will be tightened in later steps.

Loosely install the 12 main control valve body bolts.





5. Install the manual control valve detent lever spring and loosely install the bolt.





6. Tighten the main control valve body and cover plate bolts in the sequence shown.
- Tighten to 10 Nm (89 lb-in).





7. Connect the transmission internal harness to the solenoids.

1. Connect the transmission internal harness connector by pressing it in place by hand and fully seating the connector in place.

2. Connect the EPC solenoid by pressing it in place by hand and fully seating the connector in place.

3. Connect the TCC by pressing it in place by hand and fully seating the connector in place.

4. Connect the shift solenoid SSA and SSB by pressing it in place by hand and fully seating the connector in place.

5. Connect the TFT solenoid by pressing it in place by hand and fully seating the connector in place.





8. NOTE: If the transmission is being repaired for a contamination related failure, use a new transmission fluid filter and seal assembly. The transmission fluid filter can be reused if no excessive contamination is present.

Install a new transmission fluid filter and seal.





9. NOTICE: The transmission internal wire harness needs to be properly routed to avoid the potential of damage to the harness. Pinched or trapped internal wire harness may result in a transmission failure.

Make sure that the internal wire harness is properly routed.





10. Position the transmission fluid pan magnet into the transmission fluid pan.





11. NOTE: The transmission fluid pan gasket is reusable. Clean and inspect for damage. If not damaged, the transmission fluid pan gasket should be reused.

Install the transmission fluid pan and gasket.

1. Position the transmission fluid pan gasket.

2. Position the transmission fluid pan.





12. Install the transmission fluid pan bolts.
- Tighten to 14 Nm (124 lb-in).

13. NOTE: Start by filling the transmission with 4.7L (5 qt) of transmission fluid.

Fill the transmission to the correct level with transmission fluid.