National 9912 Wheel Seal - Rear, Rear Inner or Rear Outer

Overview of National 9912 Wheel Seal

The National 9912 wheel seal is engineered for reliable driveline protection in various vehicle models including Cadillac, Ford, Honda, Isuzu, Jeep, and Volvo. Designed with precision, this oil seal ensures effective sealing to prevent leaks and maintain axle integrity.

• Inside diameter: 1.875 inches (47.630 mm)
• Outside diameter: 2.865 inches (72.770 mm) expanded o.d.
• Housing bore: 2.877 inches (73.080 mm)
• Width: 0.470 inches (11.940 mm)
• Material: durable nitrile rubber for resistance to oil and wear
• Series: 9000, Type 25 oil seal

Technical Details and Specifications

The National 9912 wheel seal features a nitrile construction that offers excellent resistance to oil, grease, and other automotive fluids, making it suitable for demanding driveline applications. The seal’s inside diameter of 1.875 inches (47.630 mm) fits shafts precisely, while the outside diameter of 2.865 inches (72.770 mm) with an expanded outer diameter ensures a secure fit within the housing bore of 2.877 inches (73.080 mm). With a width of 0.470 inches (11.940 mm), this seal maintains a compact profile without compromising sealing performance. It belongs to the 9000 series, known for consistent quality in oil sealing solutions.

Compatible Vehicles and Applications

This wheel seal is compatible with a range of vehicles, including popular models such as the Cadillac DeVille, Ford F-100 and F-150, Honda Passport, Isuzu Rodeo and Rodeo Sport, Jeep Cherokee, Wrangler, Wrangler JK, TJ, and Wagoneer, as well as Volvo 240, 740, 760, 780, 940, and 960 series. The National 9912 is designed to meet the specific sealing requirements of these driveline and axle systems.

Common Uses and Problem Resolution

• Prevents oil leaks from axle shafts and wheel hubs
• Protects driveline components from dirt and contaminants
• Maintains proper lubrication within axle assemblies
• Reduces wear on bearings and seals
• Helps avoid costly driveline repairs due to seal failure

Installation Notes and Tips

When installing the National 9912 wheel seal, ensure the shaft and housing bore are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Verify the seal orientation matches the original installation to maintain proper oil retention. Lubricate the sealing lip lightly with clean oil before installation to reduce initial wear.

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The 9912 part number is backed by National’s quality control processes to ensure consistent fit and function. While specific warranty details may vary, National typically offers coverage against manufacturing defects to support professional automotive repair needs.