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