National 710431 Manual Transmission Output Shaft Seal

Reliable Manual Transmission Output Shaft Seal for Ford Mustang

The National 710431 manual transmission output shaft seal is engineered to provide durable sealing performance for Ford Mustang vehicles. Constructed from nitrile material, this oil seal is designed to maintain transmission fluid integrity and prevent leaks in demanding driving conditions.

• Material: High-quality nitrile for resistance to oil and wear
• Inside Diameter: 1.684 inches (42.780 mm)
• Outside Diameter: 2.504 inches (63.600 mm)
• Thickness: 0.433 inches (11.000 mm)
• Bi-directional lip design for effective sealing in both rotational directions
• Overall width with side lip: 1.0551 inches (26.800 mm)
• Compatible with Ford Mustang manual transmissions

Detailed Product Description

The National 710431 output shaft seal is part of the 710400 series, designed specifically for manual transmission applications. Its nitrile construction offers excellent resistance to petroleum-based fluids and mechanical wear, ensuring a long service life. The seal features a bi-directional helix lip design that enhances sealing efficiency by preventing fluid leakage regardless of shaft rotation direction. With precise dimensions including a 1.684-inch inside diameter and a 2.504-inch outside diameter, this seal fits tightly within the housing bore of 2.499 inches (63.480 mm), providing a secure barrier against contaminants and fluid loss.

Common Applications and Problem Solving

• Prevents transmission fluid leaks from the output shaft area
• Reduces risk of contamination entering the manual transmission
• Helps maintain proper lubrication for transmission components
• Addresses wear-related seal failures in Ford Mustang manual transmissions
• Mitigates issues caused by degraded or damaged output shaft seals

Installation Notes and Tips

Ensure the transmission output shaft and housing bore are clean and free of debris before installation. Carefully align the National 710431 seal to avoid lip damage during press-in. Use appropriate tools to press the seal evenly into the housing bore without distortion. Verify the seal’s bi-directional lip is correctly oriented to maintain optimal sealing performance.

Quality Assurance and Warranty

National manufactures the 710431 output shaft seal to meet industry standards for durability and performance. The nitrile material and precision engineering contribute to reliable sealing in Ford Mustang manual transmissions. While specific warranty details are not provided, National products typically adhere to strict quality control processes to ensure consistent product integrity.