Drive Pinion Installation

1. Install selected pinion depth adjusting shims in rear pinion bearing bore in housing, then seat rear bearing race in housing using suitable driver.
2. Install front bearing race in housing using suitable driver.
3. Install oil slinger, if used, then press rear bearing onto pinion.
4. Insert pinion into housing, then install front bearing, oil slinger (if used), companion flange washer and nut. Do not install preload shims or oil seal at this time.
5. Ensure bearings are lubricated, then tighten nut in small increments until bearing preload is 10 inch lbs., rotating pinion and checking rotating torque with suitable torque wrench after each adjustment.
6. Recheck pinion depth adjustment as follows:
a. Install arbor and disc assembly in bearing cap bores, then position height block on pinion face.
b. Position gauge block and dial indicator assembly on small step of height block.
c. Zero indicator, then slide gauge across or over arbor.
d. Indicator should read within .002 inch of modification code etched on pinion at highest point.
e. If reading is not within .002 inch of value on pinion, repeat shim selection.
7. When pinion depth has been verified, remove gauge tools, pinion nut, washer, companion flange and front bearing.
8. Install preload shims removed during disassembly on pinion shaft, then the front bearing and oil slinger, if used.
9. Install new seal in housing and coat seal lips with grease.
10. Install companion flange washer and pinion nut, then torque pinion nut to 250-270 ft. lbs.
11. Measure pinion bearing preload (rotating torque) with suitable torque wrench.
12. If preload is not within specifications, add or subtract shims to obtain specified preload at specified pinion nut torque.