Ford Mustang (1999-2004) Service Manual: Assembly

1. Lubricate the differential side gear thrust washers and the differential side gear journals, and assemble the washers to the gears.

• Use SAE 80W-90 Premium Rear Axle Lubricant XY-80W90-QL or equivalent meeting Ford specification WSP-M2C197-A.

2. Lubricate the differential pinion thrust washers and the differential pinion gears, and assemble the washers to the gears.

• Use SAE 80W-90 Premium Rear Axle Lubricant XY-80W90-QL or equivalent meeting Ford specification WSP-M2C197-A.

3. Position the differential side gear and thrust washer assemblies in the differential case.

4. Engage the differential pinion gears with the differential side gears and rotate the pinion gears to align with the differential pinion shaft bore.

5. Insert the differential pinion shaft.

• Align the hole in the differential pinion shaft with the hole in the differential case.

6. NOTE: If a new bolt is unavailable, coat the original bolt threads with Threadlock and Sealer EOAZ-19554-AA or equivalent meeting Ford specifications WSK-M2G351-A5 prior to installation.

Install a new bolt finger-tight.

7. Using the special tool, install the new differential bearings, if removed.

8. Position the ring gear and the differential case. Align the bolt holes by starting two bolts through the holes in the differential case and the ring gear. Press the ring gear on the differential case.

9. Install the bolts.

• Apply Stud and Bearing Mount EOAZ-19554-BA or equivalent meeting Ford specification WSK-M2G349-A1 to the bolt threads.

10. Install the differential case. For additional information, refer to Differential Case in this section.