Chevrolet Silverado / GMC Sierra. Service manual — part 2935

Fig. 18: Transfer Case Assembly Replacement
Courtesy of GENERAL MOTORS CORP.

TRANSFER CASE ADAPTER REPLACEMENT

Callout

Component Name

Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the transfer case shield, if equipped. Refer to Transfer Case Shield

Replacement .

3. Remove the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement

or Two-Piece Propeller Shaft Replacement .

4. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement .

5. Drain the fluid from the transfer case. Refer to Transfer Case Fluid Replacement.

6. Disconnect the electrical connectors and remove the electrical harness from the

transfer case.

7. Remove the crossmember. Refer to Transmission Support Crossmember

Replacement (2WD 2500 HD/3500) or Transmission Support Crossmember
Replacement (2WD 1500/2500) or Transmission Support Crossmember
Replacement (4WD 1500/2500) or Transmission Support Crossmember
Replacement (4WD 2500 HD/3500) .

8. Remove the transmission mount. Refer to Transmission Mount Replacement

(2WD) or Transmission Mount Replacement (4WD) for the 4L60-E/4L65-
E/4L70-E Transmission, or Transmission Mount Replacement (2WD) or
Transmission Mount Replacement (4WD) for the 6L50/6L80/6L90 transmission.

1

Transfer Case Nut

Tighten: 50 N.m (37 lb ft)

NOTE:

Refer to Fastener Notice .

2

Transfer Case

3

Transfer Case Gasket
Tip: Install a NEW gasket without the use of any type of sealant or lubricant.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 19: Transfer Case Adapter Replacement
Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedures

1. Remove the transfer case. Refer to Transfer Case Assembly Replacement.

2. Remove the transmission mount. Refer to Transmission Mount Replacement

(2WD) or Transmission Mount Replacement (4WD) for the 4L60-E/4L65-
E/4L70-E transmission, or Transmission Mount Replacement (2WD) or
Transmission Mount Replacement (4WD) for the 6L50/6L80/6L90 transmission.

1

Transfer Case Adapter Bolt

Tighten: 50 N.m (37 lb ft)

NOTE:

Refer to Fastener Notice .

2

Transfer Case Adapter

3

Transfer Case Adapter Seal
Tip: Always use a new seal for the adapter. Do not use any type of sealant or
adhesive in place of or with the seal.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

INPUT SHAFT SEAL REPLACEMENT

Fig. 20: Input Shaft Seal Replacement
Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedures:
Remove the transfer case. Refer to Transfer Case Assembly Replacement.

1

Transfer Case Nut
Tip: Use transfer case nuts to secure transfer case to assembly fixture J 45759 .
Special Tools:
J 45759 Assembly Fixture

2

Transfer Case
Tip: Insert the transfer case and assembly fixture into the bench holding fixture
J 3289-20 and secure with pivot pin.
Special Tools:
J 3289-20 Holding Fixture

Transfer Case Input Shaft Seal

Procedure

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

REPAIR INSTRUCTIONS - OFF VEHICLE

TRANSFER CASE DISASSEMBLE

Transfer Case Holding Fixture Installation

3

1. Remove the seal using a flat-bladed tool.

2. Install the seal using J 42738 .

Special Tools:
J 42738 Seal Installer

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 3023/3024-NQH - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado