4L60-E Automatic Transmission

Case Extension Assembly

^ Tools Required
- J21426 Case Extension Oil Seal Installer

Removal Procedure
1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
2. Remove the propeller shaft.
3. Remove the rear axle torque arm.
4. Remove the catalytic converter hanger.





5. Remove the case extension bolts (1).
6. Remove the case extension (2).
7. Remove the case extension O ring (3). Discard the O ring (3).





8. Remove the case extension seal.





9. Remove the output shaft sleeve (1), if necessary.
10. Remove the output shaft seal (2), if necessary.

Installation Procedure





1. Install the output shaft sleeve seal (2), if necessary.
2. Install the output shaft sleeve (1) using J21426, if necessary.





3. Install a new case extension seal using a soft face hammer and J21426.





4. Install a new case extension O ring (3).
5. Install the case extension (2).

Notice: Refer to Fastener Notice in Service Precautions.

6. Install the case extension bolts (1).
^ Tighten the case extension bolts (1) to 35 Nm (26 ft. lbs.).
7. Install the rear axle torque arm.
8. Install the propeller shaft.
9. Install the catalytic converter hanger.
10. Lower the vehicle.
11. Check the transmission fluid level.