F 450 4WD Super Duty V10-6.8L VIN Z CNG (2003)
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 driveshaft.
6. Remove the supports and lower the vehicle.
7. Fill the transmission to the specified level with clean automatic transmission fluid.
Extension Housing Gasket
Extension Housing Gasket-F-Super Duty
Removal
NOTE: The 4x2 application is shown, the 4x4 application is similar.
All vehicles
1. Raise the vehicle on a hoist.
4x4 vehicles
2. Remove the transfer case.
4x2 vehicles
3. Remove the driveshaft.
4. Remove the transmission insulator-to-crossmember support nuts.
5. Attach a suitable transmission jack to the transmission.
