Remove the axleshaft. Use a special slide hammer type puller to take out the axleshaft seal; if only seal replacement is needed, proceed to the next step. If both the bearing and seal need removal, they can be taken out simultaneously using a slide hammer in conjunction with a bearing removal tool. Pivot the jaws of the tool sideways and insert them behind the bearing, allowing the jaws to engage the bearing for removal. Inspect the inner surface of the housing for any issues that could hinder the new seal or bearing from fitting properly, addressing any problems such as burrs, galling, or rust before installing the new components. If replaced, lubricate the new bearing with rear axle lube and install it squarely into the axle housing bore, using a bearing/seal driver to tap it in until it bottoms out, ensuring it is pressed in squarely. Before installing the seal, apply a small amount of RTV sealant on the outer edge (avoiding the sealing lip) and coat the inner sealing lip with multi-purpose grease. Use an appropriate seal driver to tap the new seal into its bore, ensuring even pressure around its circumference until it is fully seated. Finally, install the axleshaft(s).