Fusion FWD V6-3.0L (2009)
Symptom Chart - NVH (Part 3)
Analysis of Leakage
Driveline System
Analysis of Leakage
Clean up the leaking area enough to identify the exact source.
A plugged Rear Drive Unit (RDU) housing vent can cause excessive pinion seal lip wear due to internal pressure buildup.
Verify the RDU lubricant level is at least 3-5 mm (1/8-3/16 in) below the bottom of the fill hole.
Axle Vent
A plugged vent will cause excessive seal lip wear due to internal pressure buildup. If a leak occurs, check the vent. If the vent cannot be cleared, install a
new vent.
Drive Pinion Seal
Leaks at the drive pinion seal originate from the following causes:
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Damaged seal
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Worn seal journal surface
Any damage to the seal bore (dings, dents, gouges or other imperfections) distorts the seal casing and allows leakage past the outer edge of the drive
pinion seal.
