National 4762N Wheel Seal - Rear

National 4762N Wheel Seal Overview

The National 4762N wheel seal is engineered for reliable driveline sealing in select GM and related vehicles. Designed with a bi-directional lip and polyacrylate material, this oil seal helps maintain optimal axle performance and prevent leaks in models like the Chevrolet Silverado and GMC Sierra.

• Inside diameter: 1.618 inches (41.097 mm)
• Outside diameter: 2.849 inches (72.360 mm)
• Flanged outside diameter: 3.179 inches (80.750 mm)
• Width: 0.500 inches (12.700 mm)
• Bi-directional lip design for enhanced sealing
• Constructed from durable polyacrylate material
• Redicoat surface treatment for corrosion resistance
• Compatible with housing bore of 2.841 inches (72.160 mm)

Technical Details and Material Specifications

The National 4762N wheel seal features a 74-type design with a bi-directional helix lip that provides effective sealing against oil leaks in both rotational directions. Its polyacrylate composition offers resistance to heat, wear, and automotive fluids, making it suitable for heavy-duty applications. The seal’s flanged outside diameter of 3.179 inches ensures a secure fit within the axle housing bore, which measures 2.841 inches. The Redicoat coating enhances corrosion protection, extending the service life of the seal in demanding environments.

Compatible Vehicles and Applications

This wheel seal is compatible with a range of General Motors and related vehicles, including Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, and Saab models. It fits specific models such as the Chevrolet Silverado 1500, GMC Sierra 1500 Classic, Cadillac Escalade, Hummer H3, and Isuzu Ascender, among others. The National 4762N is designed to replace worn or damaged seals in driveline and axle assemblies, ensuring proper lubrication retention and contamination exclusion.

• Prevents oil leaks in wheel hubs and axle assemblies
• Reduces contamination ingress to protect bearings
• Maintains driveline lubrication for smooth operation
• Helps avoid premature wear of axle components
• Addresses seal failure symptoms such as grease loss and noise

Installation Notes and Tips

When installing the National 4762N wheel seal, ensure the axle 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 bi-directional lip design for optimal performance. Lubricate the seal lip lightly with compatible grease or oil before installation to reduce initial wear. Check for proper fitment with the specific vehicle model to avoid leaks or premature failure.

Quality Assurance and Warranty

National wheel seals, including the 4762N, are manufactured to meet industry standards for durability and performance. The polyacrylate material and Redicoat treatment contribute to long service life under typical operating conditions. While specific warranty terms may vary, National products generally come with a limited warranty against manufacturing defects. Always consult the product documentation or supplier for detailed warranty information.