Rear Drive Axle/Differential-Dana 80

Removal
1. Raise the vehicle on a hoist or raise the rear end of the vehicle with a jack. Install safety stands under the frame rails and lower the jack or hoist far enough to allow the rear axle to drop into the rebound position for working clearance.

2. Note: To maintain driveline balance, mark the driveshaft components so they can be reinstalled in their original positions.





Disconnect the driveshaft at the rear axle, and position it aside.

3. Note: Index mark the flange (end yoke for MOTORHOME) to the pinion shaft.





While using a suitable tool to prevent the flange or yoke from turning, remove the pinion nut.





4. Using the 2-Jaw Puller, remove the flange or yoke.





5. Using the Universal Bushing Remover and the Impact Slide Hammer, remove the pinion seal.
6. Clean the rear axle pinion seal seat.

Installation

1. CAUTION: Installation without the proper tool can result in early seal failure. If the pinion seal becomes cocked during installation, remove and install a new one. Use care to ensure the garter spring remains in place during assembly. If the spring is dislodged, the pinion seal must be replaced.





Note:
^ Drive the pinion seal into the housing, using the Pinion Oil Seal Replacer.
^ The companion flange or end yoke must never be hammered on or installed with power tools.
^ Install the flange or yoke using the Companion Flange Replacer.

Follow the removal procedure in reverse order.
^ Coat the pinion seal (rubber lips) with SAE75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2Cl 92-A.