Case Adapter: Service and Repair

Removal Procedure





1. Remove the transfer case. Refer to Transfer Case Replacement.
2. For vehicles equipped with automatic transmission 4L60-E, remove the six bolts securing the adapter and the seal to the transmission.





3. For vehicles equipped with automatic transmission 4L80-E, remove the six bolts securing the adapter and the seal to the transmission.

Installation Procedure





1. For vehicles equipped with the 4L60-E automatic transmission, lubricate the seal mating surface area with oil GM P/N 12346143.
2. Install the adapter and seal to the transmission.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the six bolts securing the adapter to the transmission.
Tighten the adapter bolts to 50 Nm (37 ft. lbs.).





4. For vehicles equipped with the 41-80-E automatic transmission, lubricate the seal mating surface area with oil GM P/N 12346143.
5. Install the adapter and seal to the transmission.
6. Install the six bolts securing the adapter to the transmission.
Tighten the adapter bolts to 50 Nm (37 ft. lbs.).
7. Install the transfer case. Refer to Transfer Case Replacement.