National 8975S Wheel Seal - Front Inner

National 8975S Wheel Seal Overview

National 8975S is a wheel seal built for driveline and axle sealing applications where accurate shaft and housing dimensions matter. It uses nitrile material with Redi-Coat protection and is part of National’s 8000 series, a line backed by more than 75 years of sealing experience.

For buyers searching for a wheel seal for axle service, oil seal replacement, or a National 8975S cross-reference, this part is sized for a 2.512 in shaft and a 3.506 in housing bore. It is a direct-fit sealing component for applications that require a 0.290 in wide seal with a 3.510 in outside diameter.

Key Features

• Part number: 8975S
• Wheel seal / oil seal for driveline and axle sealing systems
• Nitrile construction for sealing performance in automotive service
• Redi-Coat finish for improved installation characteristics
• Inside diameter: 2.512 in (63.800 mm)
• Outside diameter: 3.510 in (89.150 mm)
• Housing bore: 3.506 in (89.050 mm)
• Width: 0.290 in (7.370 mm)
• Series 8000 design

Product Details

National 8975S is engineered as an oil seal for axle and wheel-end sealing service, where maintaining lubricant retention and keeping contaminants out are critical. The seal’s nitrile material and precise dimensional specs support applications that call for a 63.800 mm shaft diameter and an 89.050 mm housing bore. National’s long-standing sealing expertise and updated design approach make this a practical choice for service work on vehicles that require this exact size, including Chevrolet and GMC applications where the correct wheel seal dimensions are essential.

This part cross-references Remy 25028 and Wix 46436 for the same application. If you are replacing a worn wheel seal on Chevrolet or GMC driveline components, National 8975S provides the dimensional match needed for proper sealing performance.

What It Helps Address

• Gear oil seepage at the wheel end
• Contamination entering the axle or hub area
• Seal wear from age, heat, and mileage
• Noise or roughness caused by lubricant loss
• Service replacement for a damaged or leaking oil seal

Installation Notes and Tips

Verify shaft, housing bore, and width measurements before installation to confirm the seal matches the application. Inspect the sealing surface for scoring, corrosion, or debris, and clean the bore thoroughly before pressing the seal into place. Proper alignment during installation helps prevent distortion of the nitrile sealing lip and supports a reliable seal on Chevrolet, GMC, and other listed interchange applications.

Quality Assurance

National is recognized for premium sealing solutions and has supported the automotive aftermarket for more than 75 years. Part number 8975S is built to National’s dimensional and material standards for axle and wheel-end sealing service.