Torque Converter Clutch Solenoid: Service and Repair

Removal Procedure

Caution: Refer to Battery Disconnect Caution Service Precautions.





1. Disconnect the negative battery cable (1).
2. Raise the vehicle. Support the vehicle. Refer to Vehicle Lifting.
3. Remove the front propeller shaft. Refer to Propeller Shaft Replacement - Front.
4. Remove the drain pan. Refer to Automatic Transmission Fluid/Filter Changing.
5. Remove the valve body. Refer to Valve Body and Accumulator Pistons Removal.





6. Remove the 3 fluid pipes in the following order: 7, 4 and 8.





7. Remove the electrical connector from the Torque Converter Clutch (TCC) solenoid.
8. Remove the 2 bolts from the lower valve body.





9. Remove the TCC solenoid (1) from the lower valve body.
10. Inspect the TCC solenoid pipe O-ring (2) for cuts and other damage. Replace the O-ring as necessary.
11. For a complete schematic of the TCC system, refer to Automatic Transmission Controls Schematics.


Installation Procedure





1. Install the new TCC solenoid gasket and TCC Solenoid (1) onto the lower valve body.

Notice: Refer to Fastener Notice Service Precautions.

2. Secure the TCC solenoid onto the lower valve body with the 2 bolts.
^ Tighten the TCC solenoid bolts to 5 Nm (44 inch lbs.).
3. Install the electrical connector to the TCC solenoid.





4. Apply a thin coat of automatic transmission fluid to the fluid pipe O-rings.
5. Install the fluid pipes in the following order 8, 4 and 7.
6. Install the valve body. Refer to Valve Body and Accumulator Pistons Removal.
7. Install the drain pan. Refer to Automatic Transmission Fluid/Filter Changing.
8. Install the front propeller shaft. Refer to Propeller Shaft Replacement - Front.
9. Lower the vehicle.
10. Connect the negative (-) battery cable.
11. Refill the transmission as necessary using the following procedure.
11.1. Place the vehicle on a level surface
11.2. Remove the fluid level indicator
11.3. Add approximately 1.5 liters (1.6 qts) or Dexron III automatic transmission fluid GM P/N 12346143, or the equivalent, into the fluid filler tube.
11.4. Install the fluid level indicator into the fluid filler tube.
11.5. Apply the parking brake and block the vehicle wheels.
11.6. With the selector lever in the PARK position, start the engine. Do not race the engine.
11.7. Run the engine at idle and move the selector lever through each range and return to the PARK position.
11.8. With the engine running at idle, remove the fluid level indicator from the filler tube and wipe the indicator off.
11.9. Reinsert the fluid level indicator into the filler tube making sure it is seated in its original position.
11.10. Remove the indicator and check the fluid level. The level should be between the FULL HOT and LOW HOT marks. If the level is below the LOW HOT mark, add fluid to bring the level to the FULL HOT mark. Bringing the fluid level from the LOW HOT mark to the FULL HOT mark requires 0.3 liters (0.3 qts) of fluid. Use Dexron III automatic transmission fluid GM P/N 12346143, or the equivalent.
11.11. Conduct a road test and check the transmission level. Refer to Transmission Fluid Checking Procedure.