Hummer 26064029 Seal,Differential Drive Pinion Gear

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To remove and install a differential pinion seal, first loosen the wheel lug nuts and raise the front or rear of the vehicle on jackstands. Remove the wheels and disconnect the driveshaft from the differential pinion flange. Rotate the pinion and record the torque required to rotate it. Mark the relationship of the pinion flange to the shaft and count the number of exposed threads on the shaft. Use a special tool or chain wrench to immobilize the flange and remove the pinion nut. Withdraw the flange and pry out the old seal. Install the new seal by lubricating the lips and tapping it evenly into position. Apply RTV sealant to the ends of the splines visible in the center of the flange and install the washer and a new pinion nut. Tighten the nut until the recorded number of threads are exposed and measure the torque required to rotate the pinion. Tighten the nut in small increments until it matches the recorded figure and exceeds it by 5 in-lbs. Reinstall all components and tighten all fasteners to their specified torque values.

Loosening the wheel lug nuts, you should raise the front or rear of the vehicle and support it securely on jackstands. Consequently, block the opposite set of wheels to prevent rolling. After that, remove the wheels. Disconnecting from the differential pinion flange, secure it out of way. Hand-rotate the pinion and use a torque wrench to measure required torque for rotation. Having marked position of the pinion flange to shaft and counted number of exposed threads. It may necessary to use special tool or chain wrench to immobilize flange and remove pinion nut. If necessary, withdraw the flange with two-jaw puller. Removing old seal, discard it; Then apply lubricate lips of new seal and fill space between lips with wheel bearing grease; After that tap new seal into position using a seal installation tool or large socket; Install pinion flange aligning marks made earlier; Apply RTV sealant to ends of splines visible in center of flange; Install washer and new pinion nut tighting until the recorded number of threads are exposed; Finally measure torque required to rotate pinion and tighten nut in small increments till it matches recorded figure; Reinstall all components, tightening all fasteners to their specified torque values.

Scribe or punch alignment marks on the pinion shaft, nut, and flange to mark their relative positions before removal.

After installing the new seal, you should lubricate the lips of the seal with multi-purpose grease.

Install the washer and pinion nut.

The old seal can be removed by withdrawing the flange and prying out the old seal.

The new seal should be installed by lubricating the lips and tapping it evenly into position.

The old seal can be removed by withdrawing the flange and prying out the old seal.

The new seal should be installed by lubricating the lips and tapping it evenly into position.

The next step is to disconnect the lower stabilizer bar link from the lower control arm.

The first step is to loosen the wheel lug nuts and raise the front or rear of the vehicle on jackstands.