Transfer Case Assembly Replacement

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Transfer Case Assembly

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement . Remove the rear propeller shaft. Refer to Rear Propeller Shaft Replacement . Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement . Drain the fluid from the transfer case. Refer to Transfer Case Fluid Replacement . Disconnect the electrical connectors and remove the electrical harness from the transfer case. Remove the crossmember. Refer to Transmission Support Crossmember Replacement (4WD 2500 Series) , Transmission Support Crossmember Replacement (4WD 1500 Series) , Transmission Support Crossmember Replacement (2WD 2500 Series) , Transmission Support Crossmember Replacement (2WD 1500 Series) . Remove the transmission mount. Refer to Transmission Mount Replacement (2WD) , Transmission Mount Replacement (4WD) .
1	Transfer Case Nut CAUTION: Refer to Fastener Caution . Tighten 50 (37 lb ft)
2	Transfer Case Procedure NOTE: If installing a new or repaired transfer case, perform the Transfer Case High/Low Clutch reset. Refer to Transfer Case High/Low Clutch Reset . Install a NEW gasket without the use of any type of sealant or lubricant. For MYC and MYD transmissions (dry cavity) applications only, apply GM P/N 12345879 (Canadian P/N 10953511) or equivalent lubricant meeting GM Specification 9985830 to the input shaft splines.

Callout

Component Name

Preliminary Procedures

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
Remove the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .
Remove the rear propeller shaft. Refer to Rear Propeller Shaft Replacement .
Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement .
Drain the fluid from the transfer case. Refer to Transfer Case Fluid Replacement .
Disconnect the electrical connectors and remove the electrical harness from the transfer case.
Remove the crossmember. Refer to Transmission Support Crossmember Replacement (4WD 2500 Series) , Transmission Support Crossmember Replacement (4WD 1500 Series) , Transmission Support Crossmember Replacement (2WD 2500 Series) , Transmission Support Crossmember Replacement (2WD 1500 Series) .
Remove the transmission mount. Refer to Transmission Mount Replacement (2WD) , Transmission Mount Replacement (4WD) .

Transfer Case Nut

CAUTION:

Refer to Fastener Caution .

Tighten
50 (37 lb ft)

Transfer Case

Procedure

NOTE:

If installing a new or repaired transfer case, perform the Transfer Case High/Low Clutch reset. Refer to Transfer Case High/Low Clutch Reset .

Install a NEW gasket without the use of any type of sealant or lubricant.
For MYC and MYD transmissions (dry cavity) applications only, apply GM P/N 12345879 (Canadian P/N 10953511) or equivalent lubricant meeting GM Specification 9985830 to the input shaft splines.