Main Control Valve Body

Main Control Valve Body





Removal

1. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in Fire Suppression System. Failure to follow the instructions may result in serious personal injury.

Drain the transmission fluid and remove the transmission fluid pan and filter.

2. CAUTION: Do not pull on the molded lead frame. This may cause damage to the connector ends. Carefully pry up on the locking tabs to disconnect the solenoids. Disconnect the molded lead frame from the solenoids.

Disconnect the molded lead frame from the solenoids.
1. Disconnect the shift solenoid SSA and SSB.
2. Disconnect the torque converter clutch (TCC).
3. Disconnect the electronic pressure control (EPC) solenoid.
4. Disconnect the bulkhead inter-connector.





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





4. Remove the 24 valve body to case bolts and the EPC bracket bolt.





5. 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 using the 2 alignment 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 clean automatic transmission fluid.

Position the EPC solenoid bracket and loosely install the bolt.





4. The main control valve body bolts will be tightened in later steps.
^ Loosely install the 12 short 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 bolts in the sequence shown.
^ Tighten to 10 Nm (89 lb-inch).





7. Inspect the molded lead frame for damage.
^ Using the special tool, check all the molded lead frame solenoid connections. The gauge should fit tightly and not fall out after being inserted.
^ If the special tool easily passes through any molded lead frame connector pins or does not feel like it makes a good contact, install a new molded lead frame.





8. Connect the molded lead frame to the solenoids.
^ Connect the bulkhead inter-connector by pressing it in place by hand and fully seating the connector in place.
^ Connect the EPC solenoid by pressing it in place by hand and fully seating the connector in place. Make sure that the terminals pass fully through the connector slots.
^ Connect the TCC by pressing it in place by hand and fully seating the connector in place. Make sure that the terminals pass fully through the connector slots.
^ Connect the shift solenoid SSA and SSB by pressing it in place by hand and fully seating the connector in place. Make sure that the terminals pass fully through the connector slots.





9. Install the transmission fluid pan and filter.

10. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and procedures, refer to Fire Suppression System. Failure to follow these instructions may result in serious personal injury.

If equipped with fire suppression system, repower the system.