Differential Bearing Preload

NOTE: True bearing turning torque readings can only be obtained with the gear train removed from the case.

1. Remove bearing cup and existing shim from clutch bellhousing case.
2. Press in new bearing cup into bellhousing case (or use a cup the, has been ground down on the outer edge for ease of measurement).
3. Press in new bearing cup into gear case side.
4. Oil differential bearings with MOPAR 54 Type M.S. 9417 Manual Transaxle Fluid, or equivalent. Install differential assembly in transaxle gear case. Install clutch bellhousing over gear case. Install and torque case bolts to 29 Nm (21 ft. lbs.).
5. Position transaxle with bellhousing facing down on workbench with C-clamps. Position dial indicator.








6. Apply a medium load to differential with Tool C-4995, or equivalent and a T-Handle, in the downward direction. Roll differential assembly back and forth many times. This will settle the bearings. Zero dial indicator. To obtain end play readings, apply a medium load in the upward direction while rolling differential assembly back and forth. Record end play.
7. The shim required for proper bearing preload is total of end play and (constant) preload of 0.18 mm (0.0071 inch). Never combine shims to obtain the required preload.
8. Remove case bolts. Remove clutch bellhousing differential bearing cup. Install shim(s) selected in step 7. Then press the bearing cup into clutch bellhousing.
9. Install clutch bellhousing. Install and torque case bolts to 26 Nm (19 ft. lbs.).
10. Using special tool C-4995 and an inch-pound torque wrench, check turning torque of the differential assembly clockwise and counterclockwise. The turning torque should be 68 to 136 Nm (6 to 12 inch lbs.). If the turning torque is too high, install a 0.5 mm (0.020 inch) thinner shim. If the turning torque is too low, install a 0.5 mm (0.020 inch) thicker shim.
11. Recheck turning torque. Repeat Step 10 until the proper turning torque is obtained.