K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
a. Apply marking compound on ring gear teeth.
b. Rotate drive pinion one revolution and check gear tooth contact pattern as shown on Fig. 4. Add or remove shims as required.
c. After backlash and tooth pattern operation has been completed, remove shim packs using caution not to mix them.
d. Select new shims for each side .004 inch thicker than those removed, then install each shim on its proper side. This additional thickness will
ensure proper bearing preload.
e. Check total rotational torque. Total torque with differential case preloaded and pinion installed should be 16-29 inch lbs. if new bearings are
installed or 10-16 inch lbs. if original bearings are installed.
f.
If total rotational torque is not as specified, repeat steps 4 through 10.
11.
If drive pinion was removed, remove differential case and shims, then proceed to DRIVE PINION & BEARING SHIM ADJUSTMENT
procedure.
