Analysis Of Leakage

Driveline System


Analysis of Leakage

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

Inspect leaking area for any worn or damaged parts.

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

Verify the axle lubricant level is at least 3-5 mm (1/8-3/16 in) below the bottom of the fill hole.

Drive Pinion Nut

NOTICE: Install the drive pinion nut to the correct torque specifications or damage to the differential components may occur.

On some high-mileage vehicles, oil may leak through the threads of the drive pinion nut. This condition can be corrected by installing a new nut and applying threadlock and sealer on the threads and nut face.

Differential Seals

NOTICE: When installing shafts, do not allow splines to contact seals during installation or damage to the seals may occur.

Halfshaft pilot bearing housing seals are susceptible to the same types of damage as drive pinion seals if incorrectly installed. The seal bore must be clean and the lip handled carefully to avoid cutting or tearing it. The seal journal surface must be free of nicks, gouges and rough surface texture.

For information on differential seals, refer to Rear Drive Axle/Differential.