National 370450A Wheel Seal - Front Inner

Overview of National 370450A Wheel Seal

The National 370450A wheel seal is engineered for reliable driveline protection, designed to maintain optimal oil retention and prevent contamination. This oil bath seal is constructed from durable nitrile material, ensuring long-lasting performance in demanding automotive applications.

• Part Number: 370450A
• Material: Nitrile for enhanced durability and resistance
• Outside Diameter: 3.880 inches (98.780 mm)
• Housing Bore: 3.875 inches (98.430 mm)
• Shaft Diameter: 2.875 inches (73.030 mm)
• Width: 0.414 inches (10.520 mm)
• Redicoat coating for improved sealing and wear resistance
• Compatible installation tool: RD272
• Series: 370000

Detailed Product Description

The National 370450A wheel seal is part of the 370000 series, designed specifically for oil bath sealing applications in driveline and axle assemblies. Its nitrile construction offers excellent resistance to heat, oil, and wear, making it suitable for use in various vehicle makes and models, including popular trucks and SUVs. The precise dimensions—3.880 inch outside diameter, 3.875 inch housing bore, and 2.875 inch shaft diameter—ensure a secure fit and effective sealing performance. The Redicoat treatment enhances the seal’s surface, reducing friction and extending service life under typical operating conditions.

Common Applications and Problem Solving

• Prevents oil leaks in wheel hubs and axle assemblies
• Protects driveline components from dirt and debris contamination
• Reduces premature wear of bearings and seals
• Maintains proper lubrication in oil bath environments
• Addresses common seal failure issues in vehicles requiring 3.875 inch housing bore seals

Installation Notes and Tips

For optimal installation, use the RD272 installation tool to ensure the seal is seated evenly and without damage. Verify shaft and housing bore dimensions before installation to confirm compatibility. Clean the sealing surfaces thoroughly to remove any debris or old sealant. Avoid excessive force during installation to prevent distortion of the nitrile seal lip.

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The 370450A seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details vary by application, National products typically come with a limited warranty against manufacturing defects. Consult vehicle manufacturer guidelines and warranty terms for further information.