National 710482 Differential Pinion Seal - Front Outer

National 710482 Differential Pinion Seal

National 710482 is a differential pinion seal built for front outer applications on select Ford Super Duty trucks and the 2000 Ford Excursion. It uses a fluoro-elastomer sealing material and a bi-directional lip design to help maintain a consistent seal at the pinion shaft area.

Key Features

• Part number: 710482
• Differential pinion seal / oil seal construction
• Fluoro-elastomer material for sealing performance
• Bi-directional lip design
• Inside diameter: 1.552 in. / 39.420 mm
• Outside diameter: 3.165 in. / 80.390 mm
• Housing bore: 2.795 in. / 71.000 mm
• Thickness: 0.546 in. / 13.870 mm
• Flanged outside diameter: 2.803 in. / 71.200 mm

Detailed Description

National 710482 is part of National’s 710400 series and is engineered as a differential pinion oil seal for driveline sealing service. The seal dimensions are specified for a 1.552-inch shaft and a 2.795-inch housing bore, with metric equivalents provided for accurate matching during replacement. Its fluoro-elastomer construction and bi-directional lip design support sealing at the pinion interface where gear oil retention is critical. This part cross-references Bosch 15503 for the same application.

Compatible With 2000 Ford Excursion, Front Outer; 1999-2000 Ford F-250 Super Duty, Front Outer; and 1999-2000 Ford F-350 Super Duty, Front Outer. Use National 710482 when replacing a front outer differential pinion seal on these Ford applications with a 9-inch ring gear, Spicer 50 axle, and Monobeam axle. National 710482 is also a direct reference point for buyers searching by Ford Excursion or Ford Super Duty pinion seal fitment.

What It Helps Address

• Gear oil leakage at the differential pinion area
• Seal wear from shaft rotation and driveline use
• Contamination entering the pinion seal interface
• Replacement needs during differential service
• Fitment matching for front outer Ford axle applications

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation to confirm the correct fit. Inspect the pinion surface for wear, scoring, or corrosion before installing the new seal. Clean the bore and sealing surface thoroughly so the lip can seat evenly. Confirm the vehicle configuration matches the listed Ford Excursion, F-250 Super Duty, or F-350 Super Duty front outer application before ordering.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for modern driveline service. Part number 710482 reflects that experience in a precision-fit differential pinion seal for the listed Ford applications.