Differential Axle Housing: Description and Operation

Fig. 1 Rear Axle assembly exploded. Exc. ``C'' lock axle retention:

Fig. 2 Rear Axle assembly exploded. With ``C'' lock retention:

Figs. 1 and 2 illustrate the rear axle assemblies used on conventional models. When necessary to overhaul either of these units, refer to the Rear Axle Specifications table in this chapter. In this rear axle, Fig. 1, the rear axle housing and differential carrier are cast into an integral assembly. The drive pinion assembly is mounted in two opposed tapered roller bearings. The pinion bearings are preloaded by a spacer behind the front bearings. The pinion is positioned by a shim between the head of the pinion and the rear bearing. The differential is supported in the carrier by two tapered roller side bearings. These bearings are preloaded by shims located between the bearings and carrier housing. The differential assembly is positioned for proper ring gear and pinion backlash by varying these shims. The differential case houses two side gears in mesh with two pinions mounted on a pinion shaft which is held in place by a lock screw. The side gears and pinions are backed by thrust washers.