Pinion Installation

^ Tools Required
- J5590 Rear Pinion Bearing Cone Installer
- J8614-01 Pinion Flange Remover
- J39707 Rear Pinion Bearing Cup Installer
- J39708 Handle
- J41696 Pinion Seal Installer

1. Place the required amount of shims in the inner bearing bore. Include the baffle, if used.





2. Drive the inner bearing cup into the axle assembly using the J39708 and J39707. Make sure the cup is seated on the shims.





3. Install the inner bearing cone on the pinion. Drive the inner bearing cone onto the pinion shaft using the J5590.
4. Apply a light coat of axle lubricant to the lip of the pinion seal.
5. Install the outer bearing cone, slinger, and oil seal using the J41689.
6. Install the preload shims onto the pinion gear.
7. Install the pinion into the axle housing.





8. Install the washer and new pinion nut.
^ Tighten the pinion nut to 637 Nm (470 ft. lbs.) while holding the pinion with the J8614-01.

NOTICE: Refer to Fastener Notice in Service Precautions.

9. Tighten the nut until the pinion end play is just taken up. Rotate the pinion while tightening the nut in order to seat the bearings.
10. Once there is no end play, check the preload torque.
11. Remove the J8614-01.





12. Check the pinion preload by rotating the pinion with a torque wrench.

IMPORTANT: The pinion preload should be at or below 4 Nm (35 inch lbs.) on new bearings, or 1.2 Nm (10 inch lbs.) on old bearings.

13. Once the specified preload has been obtained, make sure the bearings are seated by rotating the pinion several times.
14. Recheck the pinion preload. Adjust the pinion preload as necessary.