Hummer H2. Manual — part 987

Fig. 138: Applying Gear Marking Compound GM P/N 1052351
Courtesy of GENERAL MOTORS CORP.

2. Use a medium stiff brush in order to sparingly apply gear marking compound GM P/N 1052351

(Canadian P/N 10953497) or equivalent to all of the ring gear teeth.

3. Using a wrench, turn the drive pinion flange/yoke so that the ring gear rotates at least 3 full revolutions.

4. Turn the drive pinion flange/yoke in the opposite direction so that the ring gear rotates at least 3 full

revolutions in the opposite direction.

5. Observe the pattern on the ring gear teeth. Compare the pattern with the following illustrations.

Correct Contact Pattern

Condition

IMPORTANT: Avoid turning the ring gear excessively.

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Fig. 139: Correct Contact Pattern
Courtesy of GENERAL MOTORS CORP.

The backlash and pinion depth is correct.

Correction

None required.

Service Hints

Loose bearing on the drive pinion or in the differential case may cause patterns that vary. If the contact pattern
varies, inspect the following preload settings:

z

Total assembly

z

Differential case

z

Drive pinion

If these settings are correct, inspect for damage or incorrectly assembled parts.

Drive Side Heel - Coast Side Toe Contact Pattern

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Fig. 140: Drive Side Heel - Coast Side Toe Contact Pattern
Courtesy of GENERAL MOTORS CORP.

Condition

The pinion depth is incorrect. The drive pinion is too far away from the ring gear.

Correction

Adjust the pinion depth of drive pinion. Refer to Pinion Depth Adjustment .

Drive Side Toe - Coast Side Heel Contact Pattern

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Fig. 141: Drive Side Toe - Coast Side Heel Contact Pattern
Courtesy of GENERAL MOTORS CORP.

Condition

The pinion depth is incorrect. The drive pinion is too close to the ring gear.

Correction

Adjust the pinion depth of drive pinion. Refer to Pinion Depth Adjustment .

Drive Side Heel - Coast Side Heel Contact Pattern

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2