Hummer H2. Manual — part 2754
10. Replace the planetary differential if any of the above conditions are found.
11. Inspect the thrust washers for excessive wear or scoring.
12. Replace the thrust washers if they are faulty.
Sun Gears and Lock-Up Hub
Fig. 60: Identifying Front Sun Gear, Rear Sun Gear & Inner Lockup Hub
Courtesy of GENERAL MOTORS CORP.
1. Clean the front sun gear (1), the rear sun gear (2), and the inner lockup hub (3) in cleaning solvent and air
dry.
2. Inspect the teeth on the front sun gear (1), the rear sun gear (2), and the inner lockup hub (3) for the
2004 Hummer H2
2004 DRIVELINE/AXLE Transfer Case - Overhaul - BW 4482-NR4
following conditions:
z
Chipped teeth
z
Excessively worn gear surfaces
Slight wear marks are normal.
z
Debris embedded in the root of the teeth
3. Inspect the thrust washer surfaces for excessive wear or scoring.
4. Replace the front sun gear (1), the rear sun gear (2), and the inner lockup hub (3) if they are faulty.
Lock-Up Shift Assembly
2004 Hummer H2
2004 DRIVELINE/AXLE Transfer Case - Overhaul - BW 4482-NR4
Fig. 61: Illustrating Lockup Shift Assembly Components
Courtesy of GENERAL MOTORS CORP.
1. If necessary, disassemble the lockup shift assembly. Refer to Transfer Case Disassemble and Transfer
Case Assemble .
2. Clean the lockup shift assembly components in cleaning solvent and air dry.
3. Inspect the lockup shift hub engagement teeth for the following conditions:
z
Chipped teeth
z
Excessively worn gear surfaces
2004 Hummer H2
2004 DRIVELINE/AXLE Transfer Case - Overhaul - BW 4482-NR4
Slight wear marks are normal.
z
Debris embedded in the root of the teeth
4. Replace the lockup shift assembly if it is faulty. The lockup shift assembly components are not serviced
separately.
Drive Chain and Sprockets
Fig. 62: View Of Drive Chain, Drive Sprocket & Driven Sprocket
Courtesy of GENERAL MOTORS CORP.
1. Clean the drive chain (1), drive sprocket (2), and driven sprocket (3) in cleaning solvent and air dry.
2. Inspect the drive chain (1) for the following conditions:
z
Loose link pins
z
Binding or stiff links
2004 Hummer H2
2004 DRIVELINE/AXLE Transfer Case - Overhaul - BW 4482-NR4
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