Extension Housing Seal

4R70E/4R75E

Extension Housing Seal









Removal

1. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in Fire Suppression System. Failure to follow the instructions may result in serious personal injury Procedures.
With the vehicle in NEUTRAL, position it on a hoist.

2. NOTE: The output shaft and driveshaft are a balanced assembly.

Index-mark the driveshaft flange and the rear pinion flange for correct alignment during assembly.





3. Remove the 4 driveshaft bolts.





4. Slide the driveshaft back enough to index-mark the driveshaft, the extension housing and the output shaft. Separate the driveshaft from the transmission.





5. Using the Transmission Fluid Seal Remover and Slide Hammer, remove the extension housing seal.





Installation

1. NOTE: When installing the new seal, make sure that the drain hole in the seal is in the 6 o'clock position.

Using the Transmission Extension Housing Oil Seal Installer, install a new extension housing seal.





2. NOTE: The output shaft and the driveshaft are a balanced assembly.

Install the driveshaft.

- Align all the index marks and position the driveshaft on the transmission.

- Install the driveshaft.





3. NOTE: To maintain driveshaft balance, install the driveshaft yoke and flange in the original position that was marked during removal.

Install the 4 driveshaft bolts.

- Tighten to 103 Nm (76 lb-ft).





4. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and procedures, refer to Fire Suppression System. Failure to follow these instructions may result in serious personal injury Procedures.
Check the level of the transmission fluid, add transmission fluid as necessary.