Chevrolet Silverado / GMC Sierra. Manual — part 2829

29. Inspect the nylon coating on the case bolts for cuts or tears.

30. Replace the case bolts if there is any damage to the nylon coating.

31. Install the case bolts, the washers, and the brackets.

Tighten: Tighten the case bolts to 21 N.m (15 lb ft).

components, or galvanic corrosion will occur. New nylon
coated case bolts and aluminum washers must be used. Use
only aluminum fill and drain plugs. Use only aluminum
brackets under the case bolts. Ensure new seals are installed
that have a rubber insulated outside diameter and have no
tears or cuts. Extensive damage will occur if there is galvanic
corrosion between the magnesium and steel components.

IMPORTANT: The case bolts are self-tapping; they must be hand started.

Do not use power assisted tools to install the bolts.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 86: Installing Output Shaft Bushing
Courtesy of GENERAL MOTORS CORP.

32. Using J 45380 , install the output shaft bushing, if removed or new. See Special Tools.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 87: Installing Rear Output Shaft Seal Using J 45756
Courtesy of GENERAL MOTORS CORP.

33. Using J 45756 , install the rear output shaft seal. See Special Tools.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 88: View Of Transfer Case Drain Plug
Courtesy of GENERAL MOTORS CORP.

34. Apply pipe sealant GM P/N 12346004 (Canadian P/N 10953480) to the threads on the

drain plug and fill plug.

35. Install the drain plug and the fill plug.

Tighten: Tighten the drain plug and fill plug to 25 N.m (18 lb ft).

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado