National 415004 Manual Transmission Output Shaft Seal

Overview of National 415004 Manual Transmission Output Shaft Seal

The National 415004 manual transmission output shaft seal is engineered to provide reliable sealing performance for various vehicle makes and models. Constructed from durable nitrile material, this oil seal is designed to maintain transmission fluid integrity and prevent leaks in manual transmission systems.

• High-quality nitrile construction for resistance to oil and wear
• Inside diameter of 2.750 inches (69.85 mm) matching standard output shaft sizes
• Outside diameter of 3.756 inches (95.4 mm) for precise housing bore fitment
• Seal thickness of 0.500 inches (12.7 mm) ensuring proper sealing depth
• Redicoat surface treatment for enhanced durability and corrosion resistance
• Part of the National 410000 series, known for consistent quality in sealing systems

Detailed Product Description and Specifications

The National 415004 output shaft seal is specifically designed for manual transmissions requiring a 2.750 inch (69.85 mm) shaft diameter and a housing bore of approximately 3.751 inches (95.28 mm). Its nitrile rubber composition offers excellent resistance to petroleum-based fluids and high temperatures commonly found in automotive transmission environments. The seal’s 0.500 inch (12.7 mm) thickness provides a secure fit to prevent fluid leakage while accommodating shaft movement. Additionally, the Redicoat treatment enhances the seal’s surface to reduce wear and extend service life. This seal is part of the National 410000 series, which focuses on gaskets and sealing systems engineered for durability and precision fitment.

Common Applications and Problem Solving

• Prevents manual transmission fluid leaks around the output shaft
• Reduces contamination ingress that can cause premature transmission wear
• Maintains proper lubrication within the transmission system
• Addresses issues related to worn or damaged output shaft seals in vehicles
• Helps avoid costly transmission repairs due to fluid loss

Installation Notes and Tips

When installing the National 415004 output shaft seal, ensure the transmission output 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’s orientation matches the original part to maintain proper sealing function. It is recommended to inspect the shaft for wear or damage before installation to ensure optimal performance.

Quality Assurance and Warranty Information

National manufactures the 415004 output shaft seal to meet industry standards for durability and performance. The use of nitrile material and Redicoat treatment reflects a commitment to quality and longevity. While specific warranty details are not provided, National products typically adhere to strict quality control processes to ensure reliability in automotive applications.