Drive Pinion Installation

^ Tools Required
- J 5590 Rear Pinion Bearing Cone Installer
- J 8614-01 Pinion Flange Remover
- J 39707 Rear Pinion Bearing Cup Installer
- J 39708 Handle
- J 41696 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 J 39708 and J 39707. Ensure 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 J 5590.
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 J 41689.
6. Install the preload shims onto the pinion gear.
7. Install the pinion into the axle housing.





Notice: Refer to Fastener Notice in Service Precautions.

8. Install the washer and a new pinion nut.
^ Tighten the pinion nut to 637 Nm (470 ft. lbs.) while holding the pinion with the J 8614-01.
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, inspect the preload torque.
11. Remove the J 8614-01.





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.

12. Inspect the pinion preload by rotating the pinion with a torque wrench.
13. Once the specified preload has been obtained, ensure the bearings are seated by rotating the pinion several times.
14. Reinspect the pinion preload. Adjust the pinion preload as necessary.