Thrust Block Selection

If cam gear, side gear and/or shims are replaced, or if thrust blocks must be replaced and original dimension cannot be determined, use following procedure during case assembly to determine proper thrust block size.
1. Secure fully assembled cam gear and side gear assemblies into respective case halves as outlined in shim selection procedure.
2. Using suitable gauge block and depth gauge, measure distance from each gear face to case mounting surface, Fig. 7, and record dimension.
3. Add together cam gear and side gear depth measurements to obtain side gear spread. When adding dimensions measured in step 2, be sure to subtract thickness of gauge block from each measurement.
4. Select 2 thrust blocks with the combined thickness of zero to .006 inch less than side gear spread measurement, measuring thrust blocks as shown, Fig. 8. Original thrust blocks can be used if they are undamaged and will provide the specified zero to .006 inch clearance. In addition, left side gear can be reshimmed to provide proper thrust block clearance as long as specified .002-.006 inch backlash is maintained between side gear and differential pinions.