Drive Pinion Depth Adjustment start here

^ Tools Required
- J7818 Rear Pinion Bearing Cup Installer
- J8092 Driver Handle
- J21777-45 Side Bearing Disc
- J39702 Arbor
- J39704 Dial Indicator
- J39707 Cup Installer
- J41690 Bearing Driver
- J41691 Adapter Cone
- J41692 Threaded Rod





1. Clean the carrier bores and all tools. Make sure the pinion bore is free of nicks and dirt.

Important: Make sure the cup is seated.

2. Drive the inner bearing cup into the axle assembly using the J39707 and J39707









3. Drive the outer bearing cup into the axle assembly using the J7818 and J8092.
4. Install the inner bearing cone into the inner bearing cup.

Notice: You may use the older style gage set if you already have them. The new style gages use the bearings as part of the gage system, while the older style uses a master block that acts as a master bearing.

Important: Install the outer bearing cone with the J41691.





5. Assemble the J41690 and J41689 into the carrier housing using the J41691 and J41692.
6. Tighten the cone by hand until all end play is removed from the gage assembly.





7. Assemble the J21777-45 into the carrier housing (1).





8. Place the J39704 and J39702 on the upper step of the J41689.
^ Apply pressure to the block of the J39704, pushing down on the J41689.
^ While applying pressure, set the J39704 at zero.





9. Slide the J39704 over the J39702.
10. Record the reading at the point of greatest deflection, when the needle of the J39704 is centered between movement to the left and right.
^ This reading determines the amount of shims needed for a nominal pinion setting.
^ The pinion marking may change the pinion depth by adding or deleting shims.
^ Refer to the pinion marking table.

11. After determining the pinion marking, remove the J39704, J39702, J41689, J41692, J41691, and J41690.

Important: If a baffle or oil slinger is used, measure the baffle or oil slinger. Include this measurement in the shim pack.

12. Measure with a micrometer each shim separately. Add the dimensions in order to obtain the total shim pack thickness.