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The pinion housing with the new O-ring is installed and fasteners are tightened down to 30 ft-lb. The gearcase mating surface on the housing is cleaned and a bead of Permatex used to provide a positive seal. Here, the centersection is shown during final installation. The retaining nuts were tightened to 40 ft-lb. The axles were installed and the driveshaft connected as well. Finally, we topped off the axle with some 90-weight gear oil. Since we didn't use a locking differential, a friction modifier or other additive is not required. On a quick testdrive, the newly rebuilt rearend delighted us with more responsive acceleration and completely quiet operation.