Companion Flange Circular Runout
COMPANION FLANGE CIRCULAR RUNOUTCaution:
^ Pinion bearing preload must be reset if the pinion nut has been loosened or removed for pinion flange reindexing or replacement.
1. Raise the vehicle on a twin-post hoist that supports the rear axle.
2. Remove the propeller shaft.
3. Check the companion flange for damage.
4. Position Companion Flange Runout Gauge ST 205-319 or equivalent on the companion flange.
5. Position Clamp Plate ST 205-320 onto Companion Flange Runout Gauge ST 205-319 (T92L-4851-B).
6. Align the holes on ST 205-320 with the holes in the flange and install the bolts. Snug the bolts evenly.
7. Position a Dial Indicator/Magnetic Base as shown. Turn the Companion Flange Runout Gauge ST 205-319 and locate and mark the high spot on the flange with yellow paint.
If the flange runout exceeds 0.25 mm (0.010 inch), remove the 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 0.25 mm (0.010 inch), replace the companion flange.
9. If excessive runout is still evident after replacement of the flange, replace the ring and pinion. Repeat the above checks until the runout is within specifications.
10. Install the propeller shaft.