Pinion Depth Setting Procedure

^ Tools Required:
- J 3289-20 Holding Fixture Base
- J 3289-21 Holding Fixture
- J 37769 Differential Holding Fixture Adapters
- J 8001 Dial Indicator Set
- J 23597-1 Arbor
- J 23597-12 Pilot Washer
- J 21777-42 Pilot Washer
- J 21777-43 Stud Assembly
- J 21777-101 Side Bearing Discs
- J 21777-102 Gage Plate
- Included in J 21777-B Pinion Setting Gage Kit

1. Lubricate both inner and outer pinion bearings with wheel bearing lubricant.











2. Place both inner and outer pinion bearings into the differential carrier and install J 21777-102, J 23597-12, J 21777-43 and J 21777-42.
3. Hold J 21777-43 stationary.





- Tighten J 21777-43 jam nut to 2 Nm (18 inch lbs.).
4. Rotate J 21777-102 25 revolutions to make sure the pinion bearings are fully seated.
- Tighten J 21777-43 jam nut to 2 Nm (18 inch lbs.).





5. Install J 21777-101 in the side bearing bores with J 23597-1 through both of the J 21777-101.
6. Rotate J 21777-102 until both gage levels are parallel with J 21777-101.





7. Install the dial indicator spring loaded plunger extension through J 23597-1 and position over the 97 mm level of J 21777-102.





8. Install J 8001 to J 23597-1 and position J 8001 plunger over the spring loaded plunger extension and slightly load the J 8001.
9. Rotate J 8001 adjustable face so that the needle indicates 0.
10. Slowly rotate J 23597-1 back and forth so that the spring loaded plunger extension sweeps back and forth across J 21777-102 while observing J 8001.
11. Stop J 23597-1 at the J 8001 greatest point of deflection.
12. Without disturbing J 8001 needle setting, rotate J 8001 adjustable face so that the needle indicates 0.
13. Slowly rotate J 23597-1 until the spring loaded plunger extension is no longer making contact with J 21777-102.
14. Record the deflection reading on J 8001.





Important: This reading indicates the selective shim required for the correct pinion depth. Refer to the PINION DEPTH SELECTIVE SHIMS TABLE for the appropriate shim size.

15. Remove J 8001 and spring loaded plunger extension from J 23597-1.
16. Remove J 23597-1 and the two J 21777-101 from the differential carrier.
17. Remove J 21777-102, the J 23597-12, the J 21777-43 and the J 21777-42 from the differential carrier.
18. Remove both inner and outer pinion bearings from the differential carrier.