National 710708 Automatic Transmission Output Shaft Seal - Right Outer

Overview of National 710708 Automatic Transmission Output Shaft Seal

The National 710708 automatic transmission output shaft seal is engineered to provide reliable sealing performance for select Ford, Hyundai, Lincoln, Mazda, and Mercury vehicles. Designed with precision dimensions and durable polyacrylate material, this oil seal helps maintain transmission integrity and prevent fluid leaks.

• Inside diameter: 2.520 inches (64.000 mm)
• Outside diameter: 3.118 inches (79.200 mm)
• Thickness/width: 0.315 inches (8.000 mm)
• Bi-directional lip design for effective sealing
• Constructed from durable polyacrylate material
• Compatible with Ford Fusion, Lincoln MKZ, Mazda CX-7, CX-9, Hyundai Veracruz, and Mercury Milan

Detailed Product Description and Specifications

The National 710708 transmission output shaft seal is part of the 710700 series, designed specifically for automatic transmissions requiring a 32-type seal. Its bi-directional lip design ensures effective sealing against transmission fluid leaks in both rotational directions, enhancing the longevity of the transmission components. The seal’s polyacrylate construction offers resistance to heat, wear, and chemical exposure commonly encountered in transmission environments.

With an inside diameter of 2.520 inches (64 mm) and an outside diameter of 3.118 inches (79.2 mm), this seal fits precisely into housings with a bore diameter of approximately 3.110 inches (79 mm). The 0.315 inch (8 mm) thickness provides a secure fit and reliable sealing surface on the output shaft, which measures 2.520 inches (64 mm) in diameter.

Applications and Common Issues Addressed

• Prevents automatic transmission fluid leaks on output shafts
• Reduces risk of contamination entering the transmission system
• Helps maintain proper transmission pressure and performance
• Addresses wear-related seal failures in Ford Fusion and Lincoln MKZ models
• Compatible replacement for transmission output shaft seals in Mazda CX-7, CX-9, Hyundai Veracruz, and Mercury Milan

Installation Notes and Tips

• Ensure the housing bore and shaft are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Verify the seal lip orientation matches the transmission fluid flow direction
• Inspect the output shaft for wear or damage prior to seal installation
• Lubricate the seal lip with transmission fluid to reduce initial wear during startup

Quality Assurance and Warranty Information

National transmission seals are manufactured to meet industry standards for durability and performance. The 710708 output shaft seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty terms may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.