F 250 4WD Super Duty V10-6.8L VIN Z CNG (2003)
7. Using the special tools, remove the rear output seal.
8. Inspect the flange seal surface for wear and damage. Install a new flange, if necessary.
Installation
1. Using the special tools, install a new rear output seal.
2. Install the rear flange.
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Use the special tool to prevent the flange from turning while installing a new nut.
3. CAUTION: Align the index marks.
Connect the rear drive shaft to the transfer case.
4. Install the four new bolts.
5. Check and, if necessary, fill the transfer case with the specified fluid to the specified level.
6. Lower the vehicle.
