Differential Assembly: Description and Operation

Fig. 1 Rear Axle Assembly:

Fig. 2 Exploded View Of Rear Axle Assembly:

The integral type rear axles have drive pinions mounted in two opposing tapered roller bearings which are preloaded by a spacer positioned between them. The differential is also supported by two tapered roller bearings. A threaded differential bearing adjuster is located in each bearing pedestal cap to eliminate differential side play, adjust and maintain ring and pinion backlash and provide a means of obtaining differential bearing preload.
Axles are retained by means of a C washer which is installed into a groove in the inner end of the axle shaft inside the differential unit.
A removable stamped steel cover, bolted to the rear of the carrier, permits inspection and service of the differential without removal of the complete axle assembly from the vehicle.
7-1/4 and 8-1/4 inch axle differentials have balanced side and pinion gears. Any attempt to mix these side or pinion gears with previously manufactured ones will result in lock up or excessive differential back lash. Side and pinion gears must be replaced as a set.