Hummer H3. Manual — part 1020

Correction

None required.

Service Hints

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

Total assembly

Differential case

Pinion

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

Drive Side Heel - Coast Side Toe Contact Pattern

Fig. 126: Identifying Drive Side Heel - Coast Side Toe Contact Pattern
Courtesy of GENERAL MOTORS CORP.

Condition

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

Correction

2007 Hummer H3

2007 Driveline/Axle Rear Drive Axle - H3

Decrease the backlash. Move the ring gear closer to the pinion by adjusting the side bearing shim
thickness or the adjuster sleeve(s). Refer to Backlash Adjustment.

Drive Side Toe - Coast Side Heel Contact Pattern

Fig. 127: Identifying Drive Side Toe - Coast Side Heel Contact Pattern
Courtesy of GENERAL MOTORS CORP.

Condition

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

Correction

Increase the backlash. Move the ring gear away from the pinion by adjusting the side bearing
shim thickness or the adjuster sleeve(s). Refer to Backlash Adjustment.

Drive Side Heel - Coast Side Heel Contact Pattern

2007 Hummer H3

2007 Driveline/Axle Rear Drive Axle - H3

Fig. 128: Identifying Drive Side Heel - Coast Side Heel Contact Pattern
Courtesy of GENERAL MOTORS CORP.

Condition

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

Correction

Decrease the backlash. Move the ring gear closer to the pinion by adjusting the side bearing shim
thickness or the adjuster sleeve(s). Refer to Backlash Adjustment.

Drive Side Toe - Coast Side Toe Contact Pattern

2007 Hummer H3

2007 Driveline/Axle Rear Drive Axle - H3

Fig. 129: Identifying Drive Side Toe - Coast Side Toe Contact Pattern
Courtesy of GENERAL MOTORS CORP.

Condition

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

Correction

Increase the backlash. Move the ring gear away from the pinion by adjusting the side bearing
shim thickness or the adjuster sleeve(s). Refer to Backlash Adjustment.

High Flank Contact Pattern

2007 Hummer H3

2007 Driveline/Axle Rear Drive Axle - H3