Determination of Backlash & Preload Shims Installation

TOOLS REQUIRED
^ J-24385-B Spreader
^ J-8001 Dial Indicator Set
^ Or Equivalent

1. Master differential bearings onto the case.
2. Differential assembly into the carrier.
3. Set up the dial indicator.
4. Force the differential assembly away from the pinion gear until it is completely seated against the cross bore face of the carrier.
5. With force still applied to the differential case, place the tip of dial indicator on a machined surface of the differential case, if available, or on the head of a ring gear screw, and set the indicator at zero (0).
6. Force the ring gear to mesh with the pinion gear. Rock the ring gear slightly to make sure the gear teeth are meshed. Repeat this procedure several times until the same reading is obtained each time. Be sure the indicator reads zero (0) each time the ring gear is forced back into contact with the cross bore face. This reading will be the necessary amount of shims to be placed between the differential case and differential bearing cone on the ring gear side.
7. The remaining amount of shims, which is the difference between the overall found in step 4 of "Side Bearing Pre-load Adjustment" and step (6) above, should be placed on the other side of the differential case, plus additional 0.38 mm (0.015 inch) for obtaining preload and backlash.





8. Place the required amount of shims on each hub as determined in the previous steps and assemble differential bearing cone.





9. Assemble the spreader and indicator to the carrier as shown. Spread the carrier 0.5 mm (0.02 inch) for differential installation. DO NOT SPREAD THE CARRIER OVER 0.5 mm (0.02 inch).
10. Remove the indicator.