Runout Check - Half-Round Companion Flange
Runout Check - Half-Round Companion FlangeCAUTION: Pinion bearing preload must be reset if the pinion nut has been loosened or removed.
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. Insert the correct size special tool.
5. Position the special tool on the pinion flange.
6. Align the holes on the gauge with the holes in the pinion flange and install the bolts and nuts.
7. NOTE: Accurate tool setup will result in accurate final readings.
Position the special tool as shown. Adjust and lightly tighten the mounting bolts and nuts so the gauge runout is 0.254 mm (0.010 inch) or less.
8. Position the special tool on the edge of the gauge. Turn the Companion Flange Runout Gauge, and locate and mark the high spot on the pinion flange with yellow paint.
If the flange runout exceeds 0.25 mm (0.010 inch), remove the pinion flange, reindex the flange one-half turn on the pinion, and reinstall it.
9. Check the runout again. If necessary, reindex the flange until an acceptable runout is obtained. If the flange runout is still more than 0.25 mm (0.010 inch), install a new pinion flange.
10. If excessive runout is still evident after installing the new pinion flange, install a new ring and pinion. Repeat the above checks until the runout is within specifications.
11. Install the driveshaft.