Pinion Flange Runout Check - Circular
WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
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.
- Raise the vehicle on a twin-post hoist that supports the rear axle.
- Remove the driveshaft. Refer to DRIVESHAFT article.
- Check the pinion flange for damage.
Item Part Number Description 1 - Pilot (part of 205-319) (T92L-4851-B) 2 354845 Pinion nut 3 205-319 Runout Gauge, Drive Pinion Flange (T92L-4851-B) 4 - Bolts (2 required) (part of 205-320) (T92L-4851-C) 5 205-320 Clamp Plate, Driveshaft (T92L-4851-C) 6 4851 Pinion flange - Position the Drive Pinion Flange Runout Gauge and Driveshaft Clamp Plate onto the pinion flange.
- Align the holes on the Driveshaft Clamp Plate with the holes in the pinion flange and install the bolts. Snug the bolts evenly.
- Position the Dial Indicator Gauge with Holding Fixture as shown in illustration. Turn the Drive Pinion Flange Runout Gauge and locate and mark the high spot on the pinion flange with yellow paint.
- 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 in), install a new pinion flange.
- 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.
- Install the driveshaft. Refer to DRIVESHAFT article.
If the flange runout exceeds 0.25 mm (0.010 in), remove the pinion flange, reindex the flange one-half turn on the pinion, and reinstall it. Refer to REAR DRIVE AXLE/DIFFERENTIAL - FORD 7.5-INCH RING GEAR article or REAR DRIVE AXLE/DIFFERENTIAL - FORD 8.8-INCH RING GEAR article for the flange removal and installation procedures.