Sierra 1500 2WD V6-4.3L (2008)
Seals and Gaskets: Service and Repair
Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6 Inch Axle w/Drum Brakes)
Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6 Inch Axle w/Drum Brakes)
Tools Required
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J 8614-01 Flange/Pulley Holding Tool
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J 22388 Rear Axle Pinion Oil Seal Installer - Rear
Removal Procedure
Important: Observe and mark the positions of all the driveline components, relative to the propeller shaft and the axles, prior to disassembly.
These components include the propeller shafts, drive axles, pinion flanges, output shafts, etc. Reassemble all the components in the exact places
in which you removed the parts. Follow any specifications, torque values, and any measurements made prior to disassembly.
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Reference mark the rear propeller shaft (3) to the rear axle pinion yoke (4).
3. Disconnect the propeller shaft from the axle.
Wrap the bearing caps with tape in order to prevent the loss of bearing rollers. Support the propeller shaft as necessary.
4. Using an inch-pound torque wrench, measure the amount of torque required to rotate the pinion. Record this measurement for reassembly. This
will give the combined preload for the following components:
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The pinion bearings
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The pinion oil seal
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The differential case bearings
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The axle bearings
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The axle seals
