Mopar R8028398AA Axle Half Shaft

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The rear axle assembly, comprising a differential assembly and axle shafts within a hollow housing, supports the vehicle's weight through leaf springs. There are two types of rear axle assemblies: light-duty and heavy-duty. Light-duty axles are semi-floating, supporting the vehicle's weight and transmitting driving forces to the rear wheels. Heavy-duty models use a full-floating axle, where the vehicle's weight is supported by the axle housing. Full-floating axles are identifiable by a large hub from the wheel's center. Operations on these models should be limited due to the need for special tools. If repair is needed, remove the axle assembly for professional rebuilding or replacement. Ensure any replacement axle matches the original in type and gear ratio.

For a full-floating axleshaft, loosen the rear wheel lug nuts, raise the rear of the vehicle, and support it securely on jack stands. Remove the wheel and axleshaft flange bolts.

The rear brake calipers should be tied up with wire to keep any stress off the flexible brake lines.

On heavy-duty models, the nut's collar should be bent out of the slot in the axle.

After removing the wheel(s), you should remove the caliper and brake disc.

Installation is the reverse of removal.