Drive Pinion Installation

1. Using micrometer or vernier gauge, measure and record thickness of original shim pack.
2. Check P.C. number on original pinion. If number is positive, subtract it from original shim pack thickness. If number is negative, add it to original shim pack thickness. Record resulting value.
3. Check P.C. number on new pinion. If number is positive, add it to value obtained in step 2. If number is negative, subtract it from value obtained in step 2.
4. Figure obtained in step 3 indicates thickness of new shim pack to be used.
5. Position correct shim pack between pinion cage and carrier. Use a minimum of three shims per pack. If pack is made up from various thicknesses of shims, place thinnest shims on either side of pack.
6. Install pinion and cage assembly with shims into carrier and tap into position with soft mallet.
7. Install pinion cage cap screws, torquing to 35 ft. lbs.