Outer Differential Pinion Seal for 1994-2003 Dodge Ram 1500 & More - National 5778V

Help keep differential lubricant sealed inside the axle housing with the National Differential Pinion Seal 5778V. It is a direct-fit replacement for many vehicles, among them the 1994-2003 Dodge Ram 1500, 1980-1988 American Motors Eagle and 1960-1972 Chevrolet C10 Pickup, with fitment cataloged for all engines. See the Buyer's Guide tab for the full list.

• Part type: Differential pinion seal from National Oil Seal.
• Position: Cataloged for the front outer and rear outer pinion seal positions.
• Quantity: The listed applications use one per application. This listing is for one seal.
• Coverage: Fits classic and later trucks, 4x4s, SUVs and passenger cars across many makes.

A pinion seal sits in the differential housing where the pinion shaft exits to meet the driveshaft. The seal body stays stationary. Its lip rides against the rotating pinion yoke or flange to hold lubricant in and keep dirt and moisture out.

Lubricant seeping where the driveshaft meets the differential may mean the seal needs replacing. So may an oily film on the yoke or housing, or a low differential fluid level. Confirm where the leak is coming from before you replace the seal. If a worn pinion seal is the cause, National 5778V replaces it.

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