Drive Pinion Flange Leak

CAUTION: Removing the pinion nut disturbs pinion bearing preload. Be sure to follow the correct procedure for setting the bearing preload when the nut is installed.

On some high-mileage units, oil may leak past the threads of the pinion nut. Correct the condition by installing a new nut or removing the nut and applying Pipe Sealant With Teflon D8AZ-19554-A or equivalent meeting Ford specification WSK-M2G350-A2 and ESR-M18P7-A on the threads and nut face.