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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1331 (Rear Drive Axle) >> Repair Instructions >> Differential Carrier Bearing Preload Adjustment (8.6 Inch Axle) >> Special Tools

Special Tools

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

J 25588:  Side Bearing Shim Installer

NOTE:
  • The differential side bearings must have preload before the backlash adjustment can be started.
  • In order to maintain the original backlash, adjust the differential case side bearing preload by changing the thickness of the left and the right side shim packs equally.
  • Measure the service shims and the service spacers one at a time. Add the measurements together in order to obtain the total thickness of the left or the right side shim pack.
  • Do not use or reuse the original cast iron production shims. Use service shims and service spacers instead.
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