Dana/Spicer Integral Housing Type
Fig. 1 Semi-floating Rear Axle:

Fig. 2 Full-floating Rear Axle:

This rear axle, Fig. 1, is a semi-floating type, while the axle shown in Fig. 2 is of the full-floating type. The drive pinion of either axle is of the over-hung design, mounted on preloaded tapered roller bearings. Sealing of the pinion shaft is accomplished by a spring-loaded seal on the companion flange. The flange is splined and secured to the pinion shaft by a nut.