Nissan 38189-21G16 Seal-Oil

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Loosen the wheel lug nuts, raise the front or rear of the vehicle and support it securely on jackstands, block the opposite set of wheels, remove the wheels, disconnect the driveshaft from the differential companion flange and fasten it out of the way, rotate the pinion a few times by hand, use a beam-type or dial type inch-pound torque wrench to check the torque required to rotate the pinion, mark the relationship of the pinion flange to the shaft, count and write down the number of exposed threads on the shaft, use a flange holding tool or chain wrench to keep the companion flange from moving while the self-locking pinion nut is loosened, remove the pinion nut, withdraw the flange, pry out the old seal and discard it, lubricate the lips of the new seal and fill the space between the seal lips with wheel bearing grease, tap it evenly into position with a seal installation tool or a large socket, install the pinion flange, apply a bead of RTV sealant to the ends of the splines visible in the center of the flange, install the pinion nut, tighten the nut until the number of threads exposed are showing, measure the torque required to rotate the pinion and tighten the nut in small increments, reinstall all components removed previously, reconnect the driveshaft to the pinion flange.