A/T Differential Carrier Bearing Preload Inspection

A/T Differential Carrier Bearing Preload Inspection

Special Tools Required

- Driver 07749-0010000
- Attachment, 83 mm 07HAD-SG00100
- Preload inspection tool 070AJ-0020101
NOTE: If the transmission housing, torque converter housing, differential carrier, tapered roller bearing, bearing outer race, or thrust shim were replaced, the bearing preload must be adjusted.

1. Remove the bearing outer race (A), the spacer (B), and the 85 mm thrust shim (C) from the transmission housing (D) by heating the housing to about 212 °F (100 °C) with a heat gun (E). Do not heat the housing more than 212 °F (100 °C).
NOTE: Let the transmission housing cool to room temperature before adjusting the bearing preload.

2. Replace the tapered roller bearing when the outer race is to be replaced.

3. Do not use a shim on the torque converter housing side.






4. Install the 85 mm thrust shim (A) in the transmission housing (B). If you replace the 85 mm thrust shim with a new one, use the same thickness shim as the old one.

5. Install the spacer (C), and the bearing outer race (D) in the transmission housing.






6. Drive the outer race securely in the housing using the driver and the attachment (83 mm) so there is no clearance between the outer race, spacer, shim, and housing.






7. Install the differential assembly (A) in the torque converter housing (B), and install the gasket (C) and the two dowel pins (D) on the housing.

8. Install the transmission housing (E), and install the mounting bolts (F) (21 bolts), (G) (two bolts), special bolt (H) with the transmission hanger (I) and the ground terminal bracket (J), then tighten the bolts to the specified torque.

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






10. Measure the starting torque of the differential assembly with the preload inspection tool, a torque wrench (A), and a socket (B). Measure the starting torque at normal room temperature in both directions.

Standard
New bearings:
3.9-5.1 N-m (40-52 kgf-cm, 35-45 lbf-in.)
Reused bearings:
3.6-4.8 N-m (37-49 kgf-cm, 32-43 lbf-in.)

11. If the starting torque is out of standard, remove the thrust shim and measure its thickness.

12. Select a new thrust shim. To increase the starting torque, increase thickness of the thrust shim. To decrease the starting torque, decrease the thickness of the thrust shim.
Changing the shim to the next size will increase or decrease the starting torque about 0.5-0.6 N-m (5-6 kgf-cm, 5-5 lbf-in.).

THRUST SHIM, 85 mm





(cont'd)


THRUST SHIM, 85 mm (cont'd)





13. Install the new thrust shim, then recheck the starting torque.