8.8-Inch Ring Gear

Removal

1. WARNING: The electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension vehicle. This can be accomplished by turning off the air suspension switch located in the RH kick panel area. Failure to do so can result in unexpected inflation or deflation of the air springs, which can result in shifting of the vehicle during these operations.

Raise and support the vehicle.





2. Note: Empty the lubricant into a clean container for reuse.

Remove the differential housing cover.
1 Remove the 10 bolts and drain the lubricant from the differential housing.
2 Remove the differential housing cover.

Installation

1. CAUTION: The machined surfaces on the differential housing and the differential housing cover must be clean and free of oil before applying the new silicone sealant. Cover the inside of the axle before cleaning the machined surface to prevent contamination.

Clean the differential housing cover and differential housing gasket mating surface.





2. CAUTION: Install the differential housing cover within 15 minutes of applying the silicone material.

Apply a continuous bead of sealant, of the specified thickness, to the differential housing cover mounting surface.
- Use Clear Silicone Rubber F7AZ-19554-CA or equivalent meeting Ford specification ESB-M4G92-A.





3. CAUTION: Allow the sealant to cure for one hour before filling the axle with lubricant.

Install the differential housing cover.
1 Position the differential housing cover.
2 Install the 10 bolts.





4. CAUTION: For Traction-Lok axles, first fill the rear axle with 118 ml (4 oz) of Additive Friction Modifier C8AZ-19B546-A or equivalent meeting Ford specification EST-M2C118-A.

Note: Service refill capacities are determined by filling the rear axle with the specified lubricant 6.4 - 14.3 mm (0.25 - 0.57 inch) below the bottom of the filler hole.

Fill the rear axle with 2.5 - 2.6 liters (5.25 - 5.50 pints) of SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B or equivalent meeting Ford specification WSL-M2C192-A and install the filler plug.

5. Note: If equipped with air suspension, reactivate the system.

Lower the vehicle.