Special Testing Procedures

Clean up the leaking area enough to identify the exact source.

A plugged axle housing vent can cause excessive pinion seal lip wear due to internal pressure buildup.

Make sure axle lubricant level is 6-14 mm (1/4-9/16 inch) below the bottom of the fill hole for Ford axles and 6-19 mm (1/4-3/4 inch) for Dana axles.