Hummer H2. Manual — part 978

and the J 45754-2 with the inner pinion bearing cup is evenly seated over the inner pinion bearing cup
bore.

6. Turn the forcing screw clockwise slowly in order to draw the outer pinion bearing cup into the outer

pinion bearing cup bore.

Inspect the position of the outer pinion bearing cup as it is being drawn into the outer 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 outer
pinion bearing cup and reposition the outer pinion bearing cup. See Special Tools and Equipment .

7. Tighten the forcing screw until the outer pinion bearing cup is seated in the outer pinion bearing cup bore.

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

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Fig. 108: Installing Inner Pinion Bearing Cup Onto J 45754-2 & Forcing Screw
Courtesy of GENERAL MOTORS CORP.

9. Install the inner pinion bearing cup onto the J 45754-2 (2) and the forcing screw (1).

10. Install the J 45754-2 (2), the forcing screw (1), and the inner pinion bearing cup into the pinion bearing

cup bore.

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Fig. 109: Installing J 45754-1 Over Outer Pinion Bearing Cup
Courtesy of GENERAL MOTORS CORP.

11. Install the J 45754-1 over the outer pinion bearing cup.

12. Attach the forcing screw to the J 45754-1.

Slowly turn the forcing screw until the J 45754-1 is evenly seated over the outer pinion bearing cup bore

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

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