4R100 Automatic Transmission

Extension Housing Seal and Bushing





Special Tool(s)





Material

Removal
1. With the vehicle in NEUTRAL, position it on a hoist.
2. Remove the rear driveshaft.





3. Using the special tools, remove the extension housing seal.





4. CAUTION: Do not damage any machined surfaces. Damage can cause the new seal to leak.

Using the special tool, remove the extension housing bushing.

Installation





1. CAUTION: Prior to installing the extension housing bushing, inspect the extension housing counterbore for burrs. If necessary, remove the burrs with an oil stone or damage to new bushing may occur.

NOTE: The extension housing bushing is model dependent.

Align the extension housing bushing in the extension housing so that the slots are in the 2 o'clock and 7 o'clock positions.





2. Using the special tool, install the extension housing bushing.





3. Align the extension housing seal in the extension housing, with the drain hole positioned downward.





4. Using the special tool, seat the extension housing seal.
5. Install the rear driveshaft.
6. Lower the vehicle.
7. Fill the transmission to the specified level with clean automatic transmission fluid.