National 471413 Manual Transmission Input Shaft Seal

Overview of National 471413 Manual Transmission Input Shaft Seal

The National 471413 manual transmission input shaft seal is engineered to provide reliable sealing performance for manual transmissions. Constructed from durable nitrile material, this oil seal is designed to maintain optimal transmission function by preventing fluid leaks and contamination.

• Material: High-quality nitrile for resistance to oil and wear
• Inside Diameter: 1.250 inches (31.750 mm)
• Outside Diameter: 1.756 inches (44.600 mm)
• Thickness/Width: 0.250 inches (6.350 mm)
• Housing Bore Compatibility: 1.752 inches (44.500 mm)
• Redicoat coating for enhanced durability
• Part Number: 471413, Series 470000

Detailed Product Description

The National 471413 input shaft seal is part of the 470000 series, designed specifically for manual transmission applications requiring precise sealing solutions. Its nitrile construction offers excellent resistance to transmission fluids, heat, and wear, ensuring long service life. The seal’s dimensions, including a 1.250-inch inside diameter and 1.756-inch outside diameter, make it suitable for transmissions with matching shaft and housing bore sizes. The Redicoat treatment enhances the seal’s surface, improving its resistance to corrosion and extending operational reliability.

Common Applications and Problem Solving

• Prevents oil leaks from manual transmission input shafts
• Protects transmission internals from dirt and contaminants
• Reduces risk of premature transmission wear due to fluid loss
• Maintains proper lubrication within the transmission system
• Helps avoid costly transmission repairs related to seal failure

Installation Notes and Tips

When installing the National 471413 input shaft seal, ensure the shaft and housing bore dimensions match the seal specifications for a proper fit. Clean the sealing surfaces thoroughly to remove debris and old sealant. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip or the nitrile material. Avoid over-tightening or misalignment during installation to maintain seal integrity.

Quality Assurance and Warranty

National manufactures the 471413 input shaft seal to meet industry standards for durability and performance. The product is a zero duplication part, ensuring authenticity and precise fitment. While specific warranty details are not provided, National’s reputation for quality in transmission sealing systems supports reliable operation when installed correctly.