Section 05-00: Axle and Driveshaft—Service | 1994 Mustang Workshop Manual |
Ensure that the hubs where the differential bearings (4221) mount are smooth. Carefully examine the differential case bearing shoulders, which may have been damaged when the differential bearings were removed. The bearing assemblies will fail if they do not seat firmly against the shoulders. Check the fit (free rotation) of the differential side gears (4236) in their counterbores. Ensure that the mating surfaces of the two parts of the case (if applicable) are smooth and free from nicks or burrs.