National 8660S Wheel Seal - Rear

National 8660S Rear Wheel Seal

National 8660S is a rear wheel seal built for driveline sealing applications where shaft size, housing bore, and seal width must match precisely. It uses a nitrile sealing material and a bi-directional lip design to help maintain a dependable seal in a wide range of rear axle applications, including Ford Crown Victoria, Ford Ranger, and Jeep Cherokee fitments.

• Rear wheel seal / oil seal for driveline and axle service
• Inside diameter: 1.399 in. / 35.530 mm
• Outside diameter: 2.296 in. / 58.320 mm
• Housing bore: 2.292 in. / 58.220 mm
• Width: 0.460 in. / 11.680 mm
• Nitrile construction for sealing performance
• Bi-directional lip design
• Redicoat finish: Yes
• National 8000 series, Type 48

Product Details

National 8660S is an oil seal engineered for rear axle and wheel-end sealing where dimensional accuracy matters. The seal’s 1.399-inch shaft diameter, 2.296-inch outside diameter, and 0.460-inch width make it a direct-match service part for many rear applications across Ford, Mazda, Chevrolet, GMC, Jeep, and Lincoln platforms. This part cross-references Dorman - HELP 47450 and Wix 46438 for the same application. National has supplied sealing solutions for more than 75 years, and this part reflects that focus on fit, material selection, and consistent sealing geometry.

What It Helps Address

• Rear axle oil seepage at the wheel-end seal
• Contamination entering the axle housing
• Grease or lubricant loss around the shaft area
• Seal wear from age, heat, and mileage
• Service issues on rear axle applications with the specified bore and shaft dimensions

Installation Notes and Fitment

Verify shaft diameter, housing bore, and seal width before installation. Clean the bore and sealing surface thoroughly, and inspect the axle shaft for grooves or wear that could affect sealing. Fits 1992-2011 Ford Crown Victoria, rear; Fits 1983-2011 Ford Ranger, rear, with 7.5 in ring gear; Fits 1990-1999 Jeep Cherokee, rear, with Spicer 35C axle; Fits 1994-2007 Mazda B3000, rear; Fits 1999-2005 Chevrolet Blazer, rear, Canadian built with 8.625 in ring gear and axle code K. Additional rear fitments include Ford Mustang, Chevrolet Camaro, Pontiac Firebird, GMC Jimmy, and Mazda B2300 applications listed in the vehicle coverage.

Quality Assurance

National is a long-established sealing brand with a reputation built on axle and wheel-end sealing products. The 8660S is part of the National 8000 series and uses nitrile material with a bi-directional lip design to support consistent sealing in service.