National 7495S Manual Transmission Output Shaft Seal

Reliable Manual Transmission Output Shaft Seal for Ford and Mercury

The National 7495S manual transmission output shaft seal is engineered to provide durable sealing performance for select Ford and Mercury vehicles. Designed with precision nitrile material, this oil seal ensures effective protection against leaks and contamination in your transmission system.

• Constructed from high-quality nitrile for resistance to oil and wear
• Inside diameter of 1.375 inches (34.930 mm) to fit the output shaft precisely
• Outside diameter measures 2.254 inches (57.250 mm) for secure housing bore fitment
• Seal thickness of 0.713 inches (18.110 mm) for optimal sealing depth
• Compatible with Ford Econoline, Mustang, and Mercury Villager models

Technical Specifications and Design Details

This National 7495S output shaft seal belongs to the 7000 series and is classified as a Type 61 oil seal. Its nitrile construction offers excellent resistance to petroleum-based fluids and mechanical wear, making it suitable for manual transmission applications. The seal’s dimensions include a 1.375-inch (34.930 mm) shaft diameter and a 2.254-inch (57.250 mm) outside diameter, matching the housing bore size of 2.250 inches (57.150 mm) to ensure a tight, leak-free fit. With a thickness of 0.713 inches (18.110 mm), this seal maintains proper contact pressure to prevent fluid leakage while accommodating shaft movement.

Compatible Vehicles and Common Applications

This manual transmission output shaft seal is compatible with the following vehicle makes and models:

• Ford Econoline
• Ford Mustang
• Mercury Villager

It is designed to replace worn or damaged seals in these vehicles, helping to maintain transmission fluid integrity and prevent contamination.

Common Issues Addressed by the National 7495S Seal

• Prevents transmission fluid leaks from the output shaft area
• Reduces risk of dirt and debris entering the transmission
• Minimizes premature wear on transmission components due to fluid loss
• Helps maintain proper lubrication and transmission performance
• Eliminates noise and vibration caused by leaking seals

Installation Notes and Tips

When installing the National 7495S output shaft seal, ensure the following for optimal performance:

• Clean the housing bore and shaft thoroughly before installation
• Inspect the shaft for wear or damage that could affect seal seating
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Apply a light coating of transmission fluid or compatible lubricant to the seal lip before installation
• Verify proper alignment to avoid seal damage during assembly

Quality Assurance and Warranty Information

National manufactures the 7495S output shaft seal to meet industry standards for durability and performance. The nitrile material and precise dimensions ensure reliable sealing under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product quality.