Shift Solenoid Replacement

REMOVAL PROCEDURE





1. Disconnect the negative battery cable.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

2. Raise the vehicle. Support the vehicle.
3. Place an index mark (reference mark) (1) on the propeller shaft pinion flange.
4. Place an index mark (reference mark) on the front differential pinion flange (3) of the transfer case to front differential propeller shaft (four-wheel drive models).
5. Remove the four nuts and the four bolts from the front differential pinion flange (four-wheel drive models).
6. Separate the pinion flange yoke from the front differential pinion flange (four-wheel drive models).

IMPORTANT: Removing the propeller shaft from the transfer case will result in fluid loss (four-wheel drive models).

7. Position and support the transfer case to the front differential propeller shaft away from the transmission fluid pan.





8. Place a drain pan or suitable container under the transmission drain plug (1).
9. Remove the drain plug in order to allow the transmission fluid pan (2) to drain.
10. Remove the fourteen transmission fluid pan bolts from the transmission.
11. Remove the transmission fluid pan from the transmission.
12. Remove the gasket from the transmission.





13. Remove the three fluid pipes in the following order 7, 4 and 8.
14. Remove the electrical connector from the shift solenoid assembly.
15. Remove the following items from the transmission body:
^ The two bolts
^ The brake applying cover
^ The brake applying cover gasket





16. Remove the following components from the lower valve body:
^ The three bolts
^ The shift solenoid assembly (3)
^ The shift solenoid assembly gasket
^ For a complete schematic of the shift solenoid assembly system, refer to Diagrams.

INSTALLATION PROCEDURE





1. Install the new shift solenoid assembly gasket and the shift solenoid assembly (3) to the lower valve body.
2. Secure the shift solenoid assembly onto the lower valve body with the three bolts.
^ Tighten the shift solenoid assembly bolts to 10 Nm (89 inch lbs.).

NOTICE: Refer to Fastener Notice in Service Precautions.

3. Install the electrical connector to the TCC solenoid.
4. Install the new brake applying cover gasket to the transmission body.
5. Install the brake applying cover onto the transmission body.
6. Secure the brake applying cover with the two bolts.
^ Tighten the brake applying cover bolts to 10 Nm (89 inch lbs.).

7. Apply a thin coat of automatic transmission fluid to the fluid pipe O-rings.
8. Install the fluid pipes in the following order 8, 4 and then 7.





9. Install the new transmission fluid pan gasket to the transmission.

IMPORTANT: When installing the transmission pan, ensure that the filler tube connects properly.

10. Install the transmission fluid pan to the transmission.
11. Secure the transmission fluid pan to the transmission with the fourteen bolts.
^ Tighten the fluid pan bolts to 5 Nm (44 inch lbs.).





12. Install the transmission drain plug (1) into the transmission.
^ Tighten the transmission drain plug to 16 Nm (12 ft. lbs.).





13. Align the index marks (1) made during the front propeller shaft removal (four-wheel drive models).
14. Install the front propeller shaft into the vehicle (four-wheel drive models).
15. Secure the front propeller shaft with four nuts and four bolts.
^ Tighten the front propeller shaft nuts and bolts to 50 Nm (37 ft. lbs.).
16. Lower the vehicle.





17. Connect the negative battery cable (4).
18. Refill the transmission as necessary using the following steps:
18.1. Place the vehicle on a level surface.
18.2. Remove the fluid level indicator.
18.3. Add proximate 1.5 liters (1.6 quarts) of Dexron III automatic transmission fluid GM P/N 12346143, or the equivalent, into the fluid filler tube.
18.4. Install the fluid level indicator into the fluid filler tube.
18.5. Apply the parking brake and block the vehicle wheels.
18.6. Start the engine with the selector lever in the PARK position. DO NOT race the engine.
18.7. Run the engine at idle and move the selector lever through each range and return it to the PARK position.
18.8. With the engine running at idle, remove the fluid level indicator from the filler tube and wipe the indicator off.
18.9. Reinsert the fluid level indicator into the filler tube making sure it is seated in its original position.
18.10. Remove the indicator and check the fluid level. The level should be between the FULL HOT (2) and the LOW HOT (3) marks. Add fluid in order to bring the fluid level to the FULL HOT mark if the level is below the LOW HOT mark. Bringing the fluid level from the LOW HOT mark to the FULL HOT mark required 0.3 liters (0.3 quarts) of fluid. Use Dexron III automatic transmission fluid GM P/N 12346143, or the equivalent.
18.11. Conduct a road test and check the transmission level.