W350 1 Ton Pickup 4WD V8-360 5.9L VIN 1 4-bbl (1988)
Fig. 22 Pinion depth gauge assembly. Model 70
PINION DEPTH, ADJUST
If original ring gear and pinion, rear pinion bearing and housing are reused, original pinion depth adjusting shims can be reused to adjust pinion depth.
However, if gear set, rear pinion bearing or housing are replaced, pinion depth adjusting shims must be selected in order to establish proper ring gear and
pinion tooth contact. Several types of pinion depth gauging tools are available from a variety of manufacturers, and manufacturer's recommendations as
to component selection and installation must be followed when using any depth gauging assembly. Procedures outlined use gauge assembly D-271 for
front drive axles, and D-116-60 or D-116-70 for rear drive axles. If no pinion depth gauge is available, preliminary shims can be selected as outlined,
and final shim selection can be determined by performing gear tooth contact inspection outlined under "Final Assembly and Adjustment."
PRELIMINARY SHIM SELECTION
Fig. 23 Pinion depth modification code identification
1.
Inspect face of both new and old drive pinion for pinion depth modification code. To ensure proper contact of ring gear and pinion teeth, pinion
may be marked with a plus (+) or minus ( - ) code number. This number indicates in thousandths of an inch necessary modifications of nominal
pinion depth. It is essential that this code number be factored when selecting pinion depth adjusting shims.
2.
Measure thickness of shim pack removed from behind rear pinion bearing race and record thickness.
