National 471766 Manual Transmission Input Shaft Seal - Front Inner

Overview of National Manual Transmission Input Shaft Seal 471766

The National Manual Transmission Input Shaft Seal 471766 is designed specifically for Ford Bronco models, providing reliable sealing performance. Engineered with nitrile material and precise dimensions, this oil seal helps maintain transmission integrity by preventing fluid leaks.

• Inside diameter: 1.250 inches (31.750 mm)
• Outside diameter: 2.004 inches (50.900 mm)
• Thickness/width: 0.250 inches (6.350 mm)
• Sealing material: durable nitrile
• Redicoat coating for enhanced wear resistance
• Compatible with Ford Bronco manual transmissions
• Part number: 471766

Technical Details and Material Specifications

This manual transmission input shaft seal from National is constructed from nitrile, a material known for its resistance to oil, heat, and wear. The seal features a 1.250-inch inside diameter to fit the input shaft precisely, while the 2.004-inch outside diameter matches the housing bore of 2.000 inches (50.800 mm). The 0.250-inch thickness ensures a secure fit and effective sealing. Additionally, the Redicoat treatment enhances the seal’s durability and longevity under demanding transmission conditions.

Compatible Vehicles and Applications

This input shaft seal is compatible with Ford Bronco models requiring a manual transmission seal with these specific dimensions. It is designed to maintain proper sealing around the input shaft, preventing transmission fluid leaks and contamination.

• Prevents oil leaks from the manual transmission input shaft
• Protects transmission internals from dirt and debris
• Maintains proper lubrication within the transmission
• Reduces risk of premature transmission wear
• Ensures smooth operation of the manual transmission system

Installation Notes and Tips

When installing the National 471766 input shaft seal, ensure the transmission housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip. Verify the shaft diameter matches the 1.250-inch specification for proper fit. Lubricate the seal lip lightly with transmission fluid before installation to reduce initial wear.

Quality Assurance and Warranty Information

National’s input shaft seal 471766 is manufactured to meet strict quality standards, ensuring consistent performance and durability. The seal is a zero duplication part, meaning it is uniquely designed for its application. While specific warranty details may vary, National typically offers coverage against manufacturing defects to support reliability in Ford Bronco manual transmission repairs.