C Yukon 2WD V8-5.7L VIN R (1999)
Seals and Gaskets: Service and Repair
Pinion Oil Seal Replacement (10 1/2 Inch Ring Gear)
Removal Procedure
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Tools Required
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J 8614-01 Companion Flange Holder/Remover
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J 24384 Pinion Oil Seal Installer
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J 5853-B Torque Wrench
The pinion oil seal and the companion flange may be replaced with the carrier assembly installed in the vehicle.
1. Raise the vehicle on a hoist and support with safety stands.
Important: Observe and mark the positions of all driveline components relative to the propeller shaft and axles prior to disassembly. These
components include the propeller shafts, drive axles, pinion flanges, output shafts, etc. All components must be reassembled in the exact relationship
to each as the components had prior to disassembly. Follow all specifications and torque values, as well as any measurements made prior to
disassembly.
2. Mark the installed position of the rear propeller shaft.
3. Disconnect the propeller shaft.
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Use a piece to tape in order to hold the bearing caps
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Secure the propeller shaft up and out of the way in a manner that does not put unnecessary stress on the universal joints
4. Measure the amount of torque required to turn the pinion using the J 5853-B.
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Record the torque measurement for reassembly
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The measurement give the combined pinion bearing, seal, and carrier bearing preload.
5. Make an alignment mark (1) on the pinion stem, pinion flange (2), and pinion flange nut.
6. Record the number of exposed threads on the pinion stem for a reference.
