Cadillac 15919548 Seal,Rear Axle Shaft

Loosen the wheel lug nuts and raise the rear of the vehicle, supporting it securely on jackstands while blocking the opposite set of wheels to prevent rolling. Remove the wheels and disconnect the driveshaft from the differential companion flange, fastening it out of the way. Mark the relationship of the pinion flange to the shaft and count the number of exposed threads on the shaft. A flange holding tool is needed to keep the companion flange from moving while loosening the self-locking pinion nut; alternatively, a chain wrench can be used. Remove the pinion nut and withdraw the flange, using a two-jaw puller if necessary, avoiding prying or hammering behind the flange or on the end of the pinion shaft. Pry out and discard the old seal, then lubricate the lips of the new seal and fill the space between the seal lips with wheel bearing grease before tapping it evenly into position with a seal installation tool or a large socket, ensuring it enters the housing squarely and to its full depth. Install the pinion flange, aligning it with the marks, and if necessary, tighten the pinion nut to draw the flange into place without hammering. Install a new pinion nut and tighten it to the specified torque, completing the installation by reversing the removal steps.

Yes, it is important to check the differential lubricant level and add more if needed to reach the appropriate level.

The lip of the new seal should be lubricated with multi-purpose grease.

Thread self-tapping screws into the seal and use pliers or a slide hammer to remove it.