Extension Housing: Service and Repair

NOTE: MERCON Automatic Transmission Fluid is being replaced by MERCON V as a service fluid.

Special Tools:

REMOVAL
1. If equipped, turn the air suspension switch OFF.
2. Disconnect the battery ground cable.
3. Raise and support the vehicle.
4. Drain the transmission fluid.





5. NOTE: To maintain initial driveshaft balance, mark the rear driveshaft yoke and axle flange so they may be installed in their original positions.

Remove the rear driveshaft.
1 Remove the four bolts.
2 Remove the rear driveshaft.





6. Remove the Vehicle Speed Sensor (VSS).
1 Disconnect the electrical connector.
2 Remove the bolt.
3 Remove the VSS.

7. Use High-Lift Jack to support the transmission.





8. Remove the nuts





9. Remove the bolts.





10. Remove the transmission crossmember.
1 Remove the bolts.
2 Remove the transmission crossmember.
11. Lower the transmission to access the extension housing bolts.





12. Use (A) Seal Remover and (B) Impact Slide Hammer to remove the (C) extension housing seal.





13. Remove the extension housing and gasket.
1 Remove the bolts and nuts.
2 Remove the extension housing and gasket.

INSTALLATION





1. Install the extension housing and gasket.
1 Position the extension housing gasket and the extension housing.
2 Install the bolts and nuts.





2. Install the new extension housing seal.
1 Align Extension Housing Seal Replacer with the seal.
2 Install the extension housing seal.
3. Raise and position the transmission.





4. Install the transmission crossmember.
1 Position the transmission crossmember.
2 Install the bolts.





5. Install the transmission crossmember bolts.
6. Remove High-Lift Jack.





7. Install the nuts.





8. Install the VSS.
1 Install the VSS.
2 Install the bolt.
3 Connect the electrical connector.
9. Lower the vehicle.
10. Connect the battery ground cable.
11. If equipped with air suspension, reactivate the system by turning on the air suspension switch.