Buick 26064028 Seal, Differential Drive Pinion Gear

Raise the rear of the vehicle and support it securely on jackstands. Block the front wheels to keep the vehicle from rolling off the stands. Disconnect the driveshaft and fasten it out of the way. On semi-floating axles, use an inch-pound torque wrench to check the torque required to rotate the pinion. Record it for use later. Scribe or punch alignment marks on the pinion shaft, nut and flange. Mark the relative positions of the pinion, nut and flange before removing the nut. Count the number of threads visible between the end of the nut and the end of the pinion shaft and record it for use later. Keep the companion flange from moving while the self-locking pinion nut is loosened. Remove the pinion nut. Withdraw the companion flange. It may be necessary to use a two or three-jaw puller engaged behind the flange to draw it out. Do Not attempt to pry behind the flange or hammer on the end of the pinion shaft. Pry out the old seal and discard it. Lubricate the lips of the new seal with high temperature grease and tap it evenly into position with a seal installation tool or a large socket. Make sure it enters the housing squarely and is tapped into its full depth. Align the mating marks made before disassembly and install the companion flange. If necessary, tighten the pinion nut to draw the flange into place. Do not try to hammer the flange into position. Apply non-hardening sealant to the ends of the splines visible in the center of the flange so oil will be sealed in. Install the washer and pin ion nut. Tighten the nut carefully until the original number of threads are exposed. On semi-floating axles, measure the torque required to rotate the pinion and tighten the nut in small increments until it matches the figure recorded. In order to compensate for the drag of the new oil seal, the nut should be tightened more until the rotational torque of the pinion slightly exceeds what was recorded earlier, but not by more than 5 in-lbs. Connect the driveshaft and lower the vehicle.

Raise the rear of the vehicle and support it securely on jackstands. Block the front wheels to keep the vehicle from rolling off the stands. Disconnect the driveshaft and fasten it out of the way. On semi-floating axles, use an inch-pound torque wrench to check the torque required to rotate the pinion. Record it for use later. Scribe or punch alignment marks on the pinion shaft, nut and flange. Mark the relative positions of the pinion, nut and flange before removing the nut. Count the number of threads visible between the end of the nut and the end of the pinion shaft and record it for use later. Keep the companion flange from moving while the self-locking pinion nut is loosened. Remove the pinion nut. Withdraw the companion flange. It may be necessary to use a two or three-jaw puller engaged behind the flange to draw it out. Do Not attempt to pry behind the flange or hammer on the end of the pinion shaft. Pry out the old seal and discard it. Lubricate the lips of the new seal with high temperature grease and tap it evenly into position with a seal installation tool or a large socket. Make sure it enters the housing squarely and is tapped into its full depth. Align the mating marks made before disassembly and install the companion flange. If necessary, tighten the pinion nut to draw the flange into place. Do not try to hammer the flange into position. Apply non-hardening sealant to the ends of the splines visible in the center of the flange so oil will be sealed in. Install the washer and pin ion nut. Tighten the nut carefully until the original number of threads are exposed. On semi-floating axles, measure the torque required to rotate the pinion and tighten the nut in small increments until it matches the figure recorded. In order to compensate for the drag of the new oil seal, the nut should be tightened more until the rotational torque of the pinion slightly exceeds what was recorded earlier, but not by more than 5 in-lbs. Connect the driveshaft and lower the vehicle.

The pinion flange can be immobilized using a special tool or a chain wrench.

After removing the pinion nut and companion flange, the old seal should be pried out and discarded.

Remove the wheels.

Use a chain wrench to keep the companion flange from moving while loosening the self-locking pinion nut.

Before removing the pinion nut and companion flange, alignment marks should be made on the pinion shaft, nut, and flange, and the number of threads visible between the nut and shaft should be counted.

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

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

Mark the relationship of the pinion flange to the shaft and count the number of exposed threads on the shaft.

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

After tightening the pinion nut, the driveshaft should be connected, the wheels should be installed, and the vehicle should be lowered. The lug nuts should be tightened to the proper torque.

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

The initial steps are to loosen the wheel lug nuts, raise the vehicle, place it securely on jackstands, and remove the wheel.

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

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

Begin by loosening the wheel lug nuts, raising the vehicle, securing it on jackstands, and removing the wheel along with the splash shield from under the front axle.