Differential Bearing Preload Adjustment
NOTE: Perform all differential bearing preload measurements with the transfer shaft and gear removed.
ADJUSTMENT USING EXISTING SHIM
1. Position the transaxle assembly vertically on the support stand, differential bearing retainer side up.
Tool L-4436 And Torque Wrench:
2. Install Tool L-4436A, or equivalent into the differential and onto the pinion mate shaft.
3. Rotate the differential at least one full revolution to ensure the tapered roller bearings are fully seated.
Checking Differential Bearings Turning Torque:
4. Using Tool L-4436A, or equivalent and an inch-pound torque wrench, check the turning torque of the differential. The turning torque should be between
5. If the turning torque is within specifications, remove tools. Setup is complete.
6. If turning torque is not within specifications proceed with the following steps.
a. Remove differential bearing retainer from the transaxle case.
b. Remove the bearing cup from the differential bearing retainer using Tool 6062A, or equivalent.
c. Remove the existing shim from under the cup.
d. Measure the existing shim.
NOTE: If the turning torque was too high when measured, install a 0.05 mm (0.002 inch) thinner shim. If the turning torque is was too low, install a 0.05 mm (0.002 inch) thicker shim. Repeat until 5 to 18 inch pounds turning torque is obtained. Oil Baffle is not required to be installed when making shim selection.
e. Install the proper shim under the bearing cup. Make sure the oil baffle is installed properly in the bearing retainer, below the bearing shim and cup.
f. Install the differential bearing retainer using Tool 5052 and C-4171, or equivalents. Seal the retainer to the housing with MOPAR Adhesive Sealant and torque bolts to 28 Nm (250 inch lbs.).
Checking Differential Bearings Turning Torque:
7. Using Tool L-4436A, or equivalent and an inch-pound torque wrench, recheck the turning torque of the differential. The turning torque should be between 5 and 18 inch-pounds. Shim thickness need be determined only if any of the following parts are replaced:
- Transaxle case
- Differential carrier
- Differential bearing retainer
- Extension housing
8. Attach a dial indicator to the case and zero the dial. Place the tip on the end of Special Tool L-4436-A, or equivalent.
9. Place a large screwdriver to each side of the ring gear and lift. Check the dial indicator for the amount of end play.
CAUTION: Do not damage the transaxle case and/or differential retainer sealing surface.
Differential Bearing Shim Chart:
10. Using the end play measurement that was determined, add 0.18 mm (0.007 inch). This should give you between 5 and 18 inch pounds of bearing preload. Refer to the Differential Bearing Shim Chart above to determine which shim to use.
11. Remove the differential bearing retainer. Remove the bearing cup.
12. Install the oil baffle. Install the proper shim combination under the bearing cup.
13. Install the differential bearing retainer. Seal the retainer to the housing with MOPAR Silicone Rubber Adhesive Sealant. Torque bolts to 28 Nm (250 inch lbs.).
14. Using Miller Special Tool L-4436-A and an inch-pound torque wrench, check the turning torque of the differential. The turning torque should be between 5 - 18 inch-pounds.
NOTE: If turning torque is too high install a 0.05 mm (0.002 inch) thicker shim. If the turning torque is too low, install a 0.05 mm (0.002 inch) thinner shim. Repeat until 5 - 18 inch-pounds of turning torque is obtained.
PRELOAD ADJUSTMENT USING GAUGING SHIM (89 - 95 ALL)
1. Remove the bearing cup from the differential bearing retainer using Tool L-4518, and remove the existing shim from under the cup.
2. Install a .50 mm (020 inch) gauging shim into the retainer. Use an arbor press to install the cup.
NOTE: Oil Baffle is not required when making shim selection.
3. Install the bearing retainer into the case and torque bolts to 28 Nm (250 in. lbs.).
4. Position the transaxle assembly vertically on the support stand and install Tool C-4995 into side gear.
5. Rotate the differential at least one full revolution to ensure tapered roller bearings are fully seated.
6. Attach a dial indicator to the case and zero the dial indicator. Place the indicator tip on the end of Tool L-4436.
7. Place a large screwdriver to each side of the ring gear and lift. Check the dial indicator for the amount of end play.
CAUTION: Do not damage the transaxle case and/or differential cover sealing surface.
Differential Bearing Shim Chart:
8. When the end play has been determined, refer to the Differential Bearing Shim Chart above for the correct shim combination.
9. remove the differential bearing retainer. Remove the bearing cup and the .50 mm (020 inch) gauging shim.
10 Install the proper shim combination under the bearing cup. make sure the oil baffle is installed properly in the bearing retainer, below the bearing shim and cup.
11. Install the differential bearing retainer. Seal the retainer to the housing with MOPAR RTV sealant. Torque bolts to 28 Nm (250 in. lbs.).
12. Using Tool C-4995 and an inch-pound torque wrench, check the turning torque of the differential. The turning torque should be between 5 and 18 inch pounds.
NOTE: If the turning torque is too high, install a .05 mm (.002 inch) thinner shim. If the turning torque is too low, install a .05 mm (.002 inch) thicker shim. Repeat until 5-18 inch pounds turning torque is obtained.