Pinion Flange Runout Check - Circular

Pinion Flange Runout Check - Circular

CAUTION: Pinion bearing preload must be reset if the pinion nut has been loosened or removed for pinion flange reindexing or replacement or damage to the component may occur.

1. Raise the vehicle on a twin-post hoist that supports the rear axle.
2. Remove the driveshaft.
3. Check the pinion flange for damage.
4. Position special tool on the pinion flange.





5. Position the special tools onto the pinion flange.





6. Align the holes on the clamp plate with the holes in the pinion flange and install the bolts. Snug the bolts evenly.





7. Position the special tool as shown. Turn the special tool, and locate and mark the high spot on the pinion flange with yellow paint.





If the flange runout exceeds 0.203 mm (0.008 inch), remove the pinion flange, reindex the flange one-half turn on the pinion, and reinstall it.
8. Check the runout again. If necessary, rotate the flange until an acceptable runout is obtained. If the flange runout is still more than 0.203 mm (0.008 inch), install a new pinion flange.





9. If excessive runout is still evident after replacement of the pinion flange, install a new ring and pinion. Repeat the above checks until the runout is within specifications.
10. Install the driveshaft.