40TE Automatic Transaxle
DIFFERENTIAL BEARING PRELOAD MEASUREMENT AND ADJUSTMENT
DIFFERENTIAL BEARING PRELOAD ADJUSTMENT USING EXISTING SHIM
Figure 1 Tool L-4436 and Torque Wrench
NOTE: Perform all differential bearing preload measurements with the transfer shaft and gear removed.
1. Position the transaxle assembly vertically on the support stand, differential bearing retainer (3) (Figure 1) side up.
2. Install Differential Tool L-4436A (1) into the differential and onto the pinion mate shaft.
Figure 2 Checking Differential Bearings Turning Torque
3. Rotate the differential at least one full revolution to ensure the tapered roller bearings are fully seated.
4. Using Differential Tool L-4436A (1) (Figure 2) and an Inch-Pound Torque Wrench (2), check the turning torque of the differential. The turning torque should be between 5 and 18 inch-pounds.
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 Remover 6062A.
c. Remove the existing shim from under the cup.
d. Measure the existing shim.
e. 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.
f. 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.
g. Install the differential bearing retainer using Installer 5052 and Handle C-4171. Seal the retainer to the housing with MOPAR(R) Adhesive Sealant and torque bolts to 28 Nm (250 in. lbs.).
7. Using Differential Tool L-4436A 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
- Differential bearing cups and cones
Differential Bearing Shim Chart:
PRELOAD ADJUSTMENT W/O SHIM
1. Remove the bearing cup from the differential bearing retainer using Remover 6062A.
2. Remove existing shim from under bearing cup.
3. Reinstall the bearing cup into the retainer using Installer 6061, and Handle C-4171.
NOTE: Oil baffle is not required when making the shim calculation.
4. Install the bearing retainer into the case. Tighten bolts to 28 Nm (250 in. lbs.).
5. Position the transaxle assembly vertically on the support stand and install Differential Tool L-4436-A into the bearing retainer.
6. Rotate the differential at least one full revolution to ensure the tapered roller bearings are fully seated.
7. Attach a dial indicator to the case and zero the dial. Place the tip on the end of Differential Tool L-4436-A.
8. 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.
9. 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 to determine which shim to use.
10. Remove the differential bearing retainer. Remove the bearing cup.
11. Install the oil baffle. Install the proper shim combination under the bearing cup.
12. Install the differential bearing retainer. Seal the retainer to the housing with Mopar(R) Silicone Rubber Adhesive Sealant. Tighten bolts to 28 Nm (250 in. lbs.).
13. Using Differential 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 0.0 5mm (0.002 inch) thinner shim. Repeat until 5-18 inch-pounds of turning torque is obtained.