Hummer H2. Manual - part 935

and the J 45754-1 with the inner pinion bearing cup is evenly seated over the inner pinion bearing cup 
bore. 

13. Turn the forcing screw clockwise slowly in order to draw the inner pinion bearing cup into the inner 

pinion bearing cup bore. 

Inspect the position of the inner pinion bearing cup as it is being drawn into the inner pinion bearing cup 
bore to ensure the bearing cup is being pulled straight into the pinion bearing cup bore. If the pinion 
bearing cup is not being pulled straight into the bearing cup bore, remove the J 45754 and the inner 
pinion bearing cup and reposition the inner pinion bearing cup. See Special Tools and Equipment . 

14. Tighten the forcing screw clockwise until the inner pinion bearing cup is seated in the inner pinion 

bearing cup bore.  

15. Remove the J 45754 . See Special Tools and Equipment .  

16. Measure the pinion depth and determine the selectable pinion shim thickness. Refer to Pinion Depth 

Adjustment .  

PINION DEPTH ADJUSTMENT 

Tools Required 

z

J 36601 Pinion Shim Selector. See Special Tools and Equipment .  

z

J 29763 Static Timing Gauge. See Special Tools and Equipment .  

1. Lubricate the pinion bearings with axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or 

equivalent meeting GM Specification 9986115. 

IMPORTANT: Make sure all of the tools, the pinion bearings, and the pinion bearing 

cups are clean before proceeding.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

  

Fig. 110: Assembling J 29763 To J 36601-3 & J 36601-7 
Courtesy of GENERAL MOTORS CORP. 

2. Assemble the J 29763 (5) to the J 36601-3 (4) and J 36601-7 (1). See Special Tools and Equipment .  

3. Assemble the J 21777-8 (3) onto the J 36601-7 (1).  

4. Install the pinion bearings and hold them in place.  

5. Insert the J 36601-7 (1) with the J 21777-8 (3) through the pinion bearings.  

6. Install the J 36601-5 (2), the washer, and the nut to the J 36601-7 (1).  

7. While holding the J 36601-3 (4) stationary, install an inch-pound torque wrench on the nut and tighten the 

nut until a rotating torque of 1.1-2.3 N.m (10-20 lb in) is obtained. 

Rotate the assembly several times in both directions in order to seat the pinion bearings. 

8. Check the rotating torque of the assembly. If the torque is less than 1.0 N.m (10 lb in), tighten the nut on 

the J 36601-7 until a rotating torque of 1.1-2.3 N.m (10-20 lb in) is obtained. 

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

  

Fig. 111: Adjusting J 29763 To Differential Bearing Bore 
Courtesy of GENERAL MOTORS CORP. 

9. Adjust the J 29763 (2) to the differential bearing bore by doing the following: 

1. Loosen the lock nut on the J 29763 . See Special Tools and Equipment .  

2. Place the contact pad of the J 36601 on the differential side bearing bore. See Special Tools and 

Equipment .  

3. With the contact pad of the J 36601 touching the differential side bearing bore, push down on the J 

29763 until the needle of the J 29763 has turned 3/4 of a turn clockwise. See Special Tools and 
Equipment .  

4. Tighten the lock nut of the J 29763 . See Special Tools and Equipment .  

IMPORTANT: The left side differential bearing adjuster assembly must be removed prior 

to placing the J 36601-3 in the differential side bearing bore.

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

  

10. Rotate the J 36601 (1) back and forth until the needle of the J 29763 (2) indicates the lowest point in the 

differential side bearing bore. See Special Tools and Equipment .  

11. At the lowest point of deflection, move the housing of the J 29763 until the needle indicates ZERO. See 

Special Tools and Equipment .  

12. Move the J 36601 back and forth again to verify the zero setting. See Special Tools and Equipment . 

Adjust the housing of the J 29763 as necessary to set the needle to ZERO. See Special Tools and 
Equipment . 

Fig. 112: Grasping J 36601 By Flats & Moving J 36601 Out Of Differential Side Bearing Bore 
Courtesy of GENERAL MOTORS CORP. 

13. After the ZERO setting is obtained and verified, grasp the J 36601 (1) by the flats and move the J 36601 

out of the differential side bearing bore. See Special Tools and Equipment .  

14. The value indicated on the J 29763 (2) is the thickness of the shim needed in order to set the depth of the 

pinion. See Special Tools and Equipment .  

15. Select the shim that indicates the proper thickness. Measure the shim with a micrometer in order to verify 

that the thickness is correct.  

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2