Drive Pinion Flange Runout

Drive Pinion Stem and Rear Universal Joint Flange
Rear axle universal joint flange runout should be checked as a potential cause of vibration. Cause of excessive rear axle universal joint flange runout is improper installation of the rear axle drive pinion seal. If the spring on the rear axle drive pinion seal is dislodged, it will jam up and cock the rear axle universal joint flange. The flange should also be indexed before replacing the gearset because of flange runout.