Differential Case Runout Check

Differential Case Runout Check





Special Tool(s)





1. CAUTION: The fixture mounting bolts must have the minimum specified thread engagement in the carrier.

Install the special tool.





2. Install the special tool.





3. Rotate the differential and check the ring gear backface runout.
^ If the ring gear backface runout exceeds the specification, the cause may be a warped ring gear, differential bearing/case damage. To determine the cause, remove the Dial Indicator with Bracketry, and proceed as follows:





4. Remove the bearing caps.
1 Remove the bolts.
2 Remove the bearing caps.





5. Remove the differential case with the bearing cups and the shims from the housing.





6. Remove the ring gear.
^ Remove the ten bolts.
^ Use a drift punch to separate the ring gear from the differential case.





7. NOTE: It may be necessary to use the Differential Carrier Spreader to carry out this step.

Install the differential case with the bearing cups and the shims in the housing.
1 Position the differential case with the bearing cups and shims.
2 Install the bearing caps.
3 Install the bolts.
4 Rotate the differential case to make sure the bearings have seated correctly.





8. Install the special tool.





9. Rotate the differential case and check the differential case runout.
^ If the runout does not exceed the specification, install a new ring gear and pinion.
^ If runout exceeds the specification, the ring gear is true and the condition is due to differential case/differential bearing damage.
^ Inspect the differential bearings and the differential case. Always install new differential bearings when installing a new differential case, or if a bearing condition is questionable.

10. Remove the bearing caps, and the differential case with the bearing cups and shims from the housing.





11. If necessary, using the special tools, remove the differential bearings.





12. CAUTION: Press against the differential bearing inner cone only.

Install the new differential bearings.
1 Position the appropriate differential bearing (RH or LH).
2 Using a suitable press and the special tool, install the differential bearing.
^ Repeat the procedure for the other differential bearing.





13. NOTE: It may be necessary to use the Differential Carrier Spreader to carry out this step.

NOTE: Recheck the flange runout.

Install the differential case with the bearing cups and the shims in the housing.
1 Position the differential case with the bearing cups and shims.
2 Install the bearing caps.
3 Install the bolts.
4 Rotate the differential case to make sure the bearings have seated correctly.





14. Install the special tool.





15. NOTE: If the runout is still excessive, install a new differential case.

Check the runout with the new differential bearings. If the runout does not exceed the specification, use the new differential bearings for assembly.





16. Remove the bolts.





17. Remove the differential case with the bearing cups and the shims from the housing.
1 Remove the bearing caps.
2 Remove the differential case with the bearing cups and the shims from the housing.

18. Install the ring gear and the differential assembly.