Ford BL3Z-4033-C
Differential Cover, Rear

The servicing and repair process for the differential cover of Ford 8.8-inch ring gear rear drive axles starts with placing the vehicle in NEUTRAL gear position on a hoist. The service starts by removing 10 bolts from the differental housing cover and evacuating the lubricant from the rear axle housing. You should clean both the machined surfaces of the rear axle housing and the differential housing cover until they are completely free of oil to avoid contamination. Press a continuous length of silicone sealant onto the differential housing cover before installing it within 15 minutes of application but renewal of surfaces along with new silicone application is necessary for any longer delays. Wet cure time for silicone sealant needs to reach one hour mark before adding lubricant to the system. Position and install the differential housing cover on the rear axle before fixing it with 10 bolts that require a torque species of 45 Nm (33ft. lbs.). You must add 118 ml (4 oz) friction modifier into Traction-Lok axles before putting rear axle lubricant and installing the filler plug that requires 30 Nm (22 ft. lbs.) torque.

Vehicle service and differential cover repair of the 9.75-inch ring gear requires first that the vehicle receives a lift followed by vehicle support. Drain the lubricant into a clean container at first and then remove the differential housing cover by unfastening its 12 bolts. Apply new silicone sealant to the surfaces of the rear axle housing and differential housing cover when they are freed from oil while constantly maintaining protective coverage of the rear axle interior from atmosphere. The installation process requires a continuous bead of Silicone Rubber D6AZ-19562-AA or equivalent according to Ford specifications ESB-M4G92-A and ESE-M4Gl95-A to be applied on the differential housing cover. Installation of the cover needs to happen within 15 minutes of silicone application time or else the sealant will require replacement. Before filling the lubricant container it is necessary to wait one full hour for the silicone sealant to reach full cure. Secure the differential housing cover bolts after its installation. The rear axle of Traction-Lok systems requires 118 ml (4 ounces) of Ford Additive Friction Modifier C8AZ-1911546-A or a matching product that follows Ford specification EST-M2C118-A. After adding this solution, use SAE 75W-140 High Performance Rear Axle Lubricant F1TZ-19580-B which follows WSL-M2092-A Ford specification and reinstall the filling plug prior to lowering the vehicle.

A Ford 10.25 Inch Rear Axle differential cover service requires vehicle elevation followed by bolt removal from the 12 housing cover bolts and subsequent drain of rear axle housing oil. You should remove the differential housing cover after completing the drainage process. The machined surfaces of both the rear axle housing and differential housing cover need to be cleaned thoroughly of all oil residue before silicone sealant application creates a continuous bead on the differential cover. The differential housing cover needs installation within 15 minutes after silicone application because delayed installation requires sealant reapplication. Proper silicone sealant curing requires 1 hour waiting time prior to adding lubricant into the system. The rear axle filler procedure requires the specified lubricant to be added after installing the differential housing cover bolts and putting in the filler plug. Prior to adding lubricant into Traction-Lok axles you need to add 236.5 milliliters (8 ounces) of additive friction modifier. Finally, lower the vehicle.

First service the Ford 10.25 Inch Rear Axle differential cover by supporting the vehicle and removing its 12 cover bolts and draining the housing lubricant. Remove the differential housing cover after completing the drainage process. The service begins with proper cleaning of all machined surfaces between the rear axle housing and differential housing cover and preventive isolation of the rear axle interior to maintain purity. Use new Clear Silicone Rubber D6AZ-19562-AA or equivalent material that satisfies Ford specifications ESB-M4C192-A and ESE-M4G195-A to form a continuous seal on the differential housing cover. The differential housing cover needs to be installed within 15 minutes after silicone application or new sealant must be reapplied. Filling the lubricant should be delayed until at least one hour has passed after silicone sealant curing. Secure the differential housing cover by tightening the bolts after its installation. Addition of lubricant for rear axle service should go to the marked level beneath the filler opening and Traction-Lok axle refills require 236.5 ml (8 ounces) of Ford Additive Friction Modifier prior to installing the filler plug. Finally, lower the vehicle.

Service and repair of the Ford 8.8 Inch Rear Axle differential cover begins with hoisting the vehicle to remove its 10 differential housing cover bolts which drain the lubricant from the rear axle housing. Newly drained lubricating fluid requires the removal of the differential housing cover. Clean both the machined surfaces of the differential housing and rear axle housing until they are oil-free before installing a new continuous silicone sealant bead onto the differential housing cover. Sealant application should take place within 15 minutes before install so that new application of sealant can be avoided. The operating team needs one hour of sealing time before the lubricant addition process can begin. You should position the differential housing cover then fasten it with all 10 differential housing cover bolts. The rear axle requires 118 ml (4 ounces) of friction modifier before receiving 2.54 liters (5.37 pints) of rear axle lubricant for which you will install the filler plug. Finally, lower the vehicle.

Clean the mounting surfaces on both the differential housing cover and the differential housing with a suitable solvent to eliminate any oil film.

Ensure the vehicle is in neutral and positioned on a hoist.

Begin by raising the vehicle on a hoist or using a jack to lift the rear end, then secure it with safety stands under the frame rails and lower the jack or hoist to allow the rear axle to drop into the rebound position for working clearance.

The differential housing cover requires silicone rubber sealant as a gasket.

Raise the vehicle on a hoist or use a jack to lift the rear end, then install safety stands under the frame rails.

Tighten the bolts to 45 Nm (33 ft. lbs.).

The gasket mating surface of the rear axle and the differential housing cover.

Remove the 12 differential housing cover bolts and take off the differential housing cover.

Tighten the 12 bolts to 45 Nm (33 lb-ft).

First fill the rear axle with 118 ml (4 oz) of specified Ford Friction Modifier.

It is advisable to wait 1 hour to allow the silicone sealant to cure properly.

First, raise and support the vehicle.

Secure it with the 12 bolts, tightening them to 45 Nm (33 lb-ft).

Remove the 12 differential housing cover bolts and then the differential housing cover, allowing the lubricant to drain into a clean container for reuse.

Remove the 10 differential housing cover bolts and take off the differential housing cover.

Remove the 10 differential housing cover bolts and then the differential housing cover, allowing the lubricant to drain into a clean container for reuse.

Clean the machined surfaces on both the differential housing and the cover, ensuring they are free of oil to prevent contamination.

Clean the machined surfaces, ensuring they are free of oil to prevent contamination.

Apply a new continuous bead of silicone sealant.

Ensure the electrical power to the air suspension system is turned off by switching off the air suspension switch located in the right-hand kick panel area.

Raise and support the vehicle, then position the rear stabilizer bar and rear axle tracking bar aside.