TrailBlazer 2WD L6-4.2L VIN S (2003)
Seals and Gaskets: Service and Repair
Drive Pinion Flange/Yoke and/or Oil Seal Replacement
Drive Pinion Flange/Yoke and/or Oil Seal Replacement
Tools Required
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J8614-01 Flange and Pulley Holding Tool
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J33782 Pinion Oil Seal Installer
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J38694 Extension Housing Oil Pump/Seal Installer
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 the vehicle. Refer to Vehicle Lifting.
2. Remove the tire and wheel assemblies.
3. Remove the rear brake calipers.
4. Remove the brake rotors.
5. Remove the propeller shaft.
6. Measure the amount of torque required to rotate the pinion. Use an inch-pound torque wrench. 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
7. Place an alignment mark between the pinion and the pinion yoke.
