Drive Pinion Stem and Pinion Flange
WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Check the pinion flange runout when all other checks have failed to show the cause of vibration.
One cause of excessive pinion flange runout is incorrect installation of the axle drive pinion seal. Check to see if the spring on the seal lip has been dislodged before installing a new ring gear and pinion.
Coupling Shaft Center Bearing Alignment - 158 and 176 Inch Wheelbase
Vehicle noise and vibration can be caused by a dislocated/failed driveshaft center bearing support rubber insulator, a contaminated driveshaft center bearing support (4800) or excessive compression of the rubber insulator. For additional information, refer to DRIVESHAFT .