K 2500 Yukon 4WD V8-6.0L VIN U (2000)
Tighten the adapter bolts to 50 Nm (37 ft. lbs.).
4. For vehicles equipped with the 4L80-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 6 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.