National 473457 Transfer Case Output Shaft Seal - Front or Rear

Overview of National Transfer Case Output Shaft Seal 473457

The National Transfer Case Output Shaft Seal 473457 is designed to provide reliable sealing performance for Ford trucks, including the F-150, F-250, and F-350 models. Engineered with nitrile material and precise dimensions, this oil seal helps maintain transfer case integrity and prevent fluid leaks.

• Inside diameter: 1.875 inches (47.630 mm)
• Outside diameter: 3.066 inches (77.880 mm)
• Thickness/width: 0.375 inches (9.530 mm)
• Sealing material: durable nitrile for resistance to oil and heat
• Redicoat coating for enhanced wear protection
• Compatible with housing bore size 3.061 inches (77.750 mm)
• Zero duplication part ensuring unique fit and quality

Detailed Product Description

This National transfer case output shaft seal (part number 473457) is manufactured from nitrile, a material known for its excellent resistance to petroleum-based fluids and high temperatures. The seal features a 1.875-inch inside diameter and a 3.066-inch outside diameter, matching the housing bore of 3.061 inches to ensure a secure fit. With a thickness of 0.375 inches, it provides a robust barrier against fluid leakage. The Redicoat treatment adds an extra layer of protection against wear and corrosion, extending the service life of the seal. This part is specifically designed for Ford F-150, F-250, and F-350 transfer cases, making it a precise replacement for maintaining drivetrain performance.

Common Applications and Problem Solving

• Prevents transfer case fluid leaks that can cause drivetrain damage
• Eliminates contamination entry into the transfer case output shaft area
• Reduces wear on the output shaft by maintaining proper lubrication
• Addresses noise and vibration issues caused by worn or damaged seals
• Helps maintain transfer case pressure and fluid levels for optimal operation

Installation Notes and Tips

• Ensure the housing bore is clean and free of debris before installation
• Use appropriate tools to avoid damaging the seal during installation
• Verify the seal orientation matches the original part for proper sealing
• Check shaft and bore dimensions to confirm compatibility
• Apply a light coating of transfer case fluid to the seal lip before installation

Quality Assurance and Warranty

National transfer case output shaft seals are manufactured to meet strict OEM specifications, ensuring reliable performance and durability. The 473457 seal is a zero duplication part, guaranteeing a unique and precise fit for Ford F-150, F-250, and F-350 models. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship to provide confidence in your purchase.