Shimming Procedures

Shimming Procedures

Tools Required
^ J7079-2 Universal Driver Handle - Non-Threaded
^ J44385 Differential Bearing Race and Seal Installer
^ J44388 Final End Checking Fixture





1. Important: Remove all of the old shims before performing the Shimming Procedures.

Make sure the bearings are fully seated in the case.





2. Position the transaxle on a bench so that the bearings are resting on a flat surface.
3. Using a rubber mallet, tap lightly on the case mating surface to ensure the bearings are fully seated.





4. Measure the distance of the transaxle case parting surface to the output shaft gear thrust washer surface using the J44388-1.
5. Place the J44388-1 on the case parting surface.
6. Extend the gage rod on the J44388-1 until it is bottomed on the output shaft gear thrust washer.
7. Tighten the thumbscrew on the J44388-1 to retain the gage rod.





8. Measure and record the length of the gage rod protruding from the gage bar (measurement A).





9. Make sure the left differential bearing race is fully seated into the transaxle case using the J7079-2 (1) and the J44385 (2).





10. Install the J44388-2 into the left differential side bearing race. Ensure that the J44388-2 is fully seated into the left differential side bearing race.





11. Remove the gage rod from the J44388-1 (2).
12. Place the bar of the J44388-1 (2) onto the gage rod of the J44388-2 (1).
13. Tighten the thumbscrew on the J44388-1 (2) to retain the J44388-2 (1) gage rod.





14. Measure the overall height of the J44388-1 (1) and J44388-2 (2) (measurement B).





15. Measure the height of just the J44388-1 (measurement C).
16. Subtract the height of the J44388-1 (measurement C) from the overall height of the J44388-1 and J44388-2 (measurement B) and record (measurement D).





17. Place the differential assembly onto the J44388-4 to provide a steady measuring surface.





18. Install the rod back into the J44388-1 (1).
19. Place the J44388-1 (1) across the face of the ring gear.
20. Center the gage rod of the J44388-1 (1) over the land for the left differential side bearing shim.
21. With the gage rod of the J44388-1 (1) fully seated on the shim land for the left differential side bearing shim, tighten the thumbscrew on the J44388-1 (1).





22. Measure and record the length of the gage rod protruding from the J44388-1 (measurement E).





23. Remove the vehicle speed sensor (VSS) ring.

24. Important: Both retaining rings must be removed from the pinion shaft to ensure proper removal of the differential pinion shaft.

Remove and discard both the differential pinion shaft retaining rings and remove the differential pinion shaft.





25. Insert the J44388-3 (1) through the center of the differential until it rests firmly on the J44388-4 (2).





26. The distance from the top surface of the J44388-3 (1) to the land of the right differential side bearing shim is measured and recorded (measurement F).
27. Subtract measurement F from 127 mm (5 inch) (measurement G).





28. To obtain shim size for left differential side shim (1) use the following formula: Shim (1) = E - A + D - 19.036 mm (0.749 inch).
29. To obtain shim size for right differential side shim (2) use the following formula: Shim (2) = 94.65 mm (3.726 inch) - G - shim (1).