Carrier Bearings: Adjustments

TAPERED ROLLER BEARING PRELOAD ADJUSTMENT

NOTE: If the transmission housing, torque converter housing, differential carrier, tapered roller bearing, outer race or thrust shim were replaced, the bearing preload must be adjusted.





1. Remove the bearing outer race and thrust shim from the transmission housing by heating the housing to about 212°F (100°C) with a heat gun.

CAUTION:
- Do not heat the housing in excess of 212°F (100°C).
- Replace the tapered roller bearing when the outer race is to be replaced.
- Do not use a shim on the torque converter housing side.

NOTE: Let the transmission housing cool to the room temperature before adjusting the bearing preload.








2. Select the 2.60 mm (0.102 inch) thrust shim from the middle of the table.





3. After installing the thrust shim, install the outer race in the transmission housing, using the special tools as shown.

NOTE:
- Install the outer race squarely in the transmission housing.
- Check that there is no clearance between the outer race, shim and transmission housing.

4. With the mainshaft, countershaft and secondary shaft removed, install the differential assembly and torque the transmission housing.

NOTE: Install the gasket when checking starting torque. Torque to 44 Nm (33 ft. lbs.)

5. Rotate the differential assembly in both directions to seat the bearings.





6. Measure the starting torque of the differential assembly with the special tool and a torque wrench. Standard:
- New bearings: 2.7 - 3.9 Nm (24 - 35 inch lbs.)
- Reused bearings: 2.5 - 3.6 Nm (22 - 32 inch lbs.)

NOTE:
- Measure the starting torque at normal room temperature in both directions.
- Changing the shim to the next size will increase or decrease starting torque about 0.3 - 0.4 Nm (2.6 - 3.5 inch lbs.).
- To increase the starting torque, increase the thickness of the shim. To decrease the starting torque, decrease the thickness of the shim.