Pinion Flange Runout Check - Circular

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Check the pinion flange for damage.

Position Drive Pinion Flange Runout Gauge on the pinion flange.

Fig 1: Exploded View Of Circular Pinion Flange

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	-	Pilot (part of 205-319 [T92L-4851-B])
2	-	Pinion nut
3	205-319	Drive pinion flange runout gauge
4	-	Bolts (2 required) (part of 205-320 [T92L-4851-C])
5	205-320	Driveshaft clamp plate
6	4851	Pinion flange

Position the Driveshaft Plate onto the Drive Pinion Flange Runout Gauge.

Fig 2: Positioning Driveshaft Plate Onto Drive Pinion Flange Runout Gauge

Courtesy of FORD MOTOR CO.

Align the holes on the Driveshaft Plate with the holes in the pinion flange and install the bolts. Snug the bolts evenly.

Fig 3: Aligning Clamp Plate Holes

Courtesy of FORD MOTOR CO.

Position the Dial Indicator Gauge with Holding Fixture as shown. Turn the Drive Pinion Flange Runout Gauge, and locate and mark the high spot on the pinion flange with yellow paint.

Fig 4: Positioning Dial Indicator Gauge With Holding Fixture

Courtesy of FORD MOTOR CO.

If the flange runout exceeds 0.25 mm (0.010 in), remove the pinion flange, re-index the flange one-half turn on the pinion and reinstall it. Refer to REAR DRIVE AXLE/DIFFERENTIAL - DANA 60 AND 70 article.
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.

Fig 5: Checking Runout

Courtesy of FORD MOTOR CO.

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