National 710706 Automatic Transmission Output Shaft Seal - Right

Overview of National 710706 Automatic Transmission Output Shaft Seal

The National 710706 automatic transmission output shaft seal is engineered to provide reliable sealing performance for select Ford, Lincoln, Mazda, and Mercury vehicles. Designed with precision dimensions and durable polyacrylate material, this seal helps maintain transmission integrity and prevent fluid leaks.

• Inside diameter: 1.654 inches (42.000 mm)
• Outside diameter: 2.843 inches (72.200 mm)
• Flanged outside diameter: 3.146 inches (79.900 mm)
• Thickness: 0.502 inches (12.750 mm)
• Bi-directional lip design for effective sealing
• Material: Polyacrylate for enhanced durability
• Compatible with housing bore diameter of 2.835 inches (72.000 mm)

Detailed Product Description and Specifications

The National 710706 output shaft seal is part of the 710700 series, designed specifically for automatic transmissions requiring a 74-type seal. Its bi-directional lip design ensures effective sealing against transmission fluid leaks in both rotational directions, which is critical for maintaining transmission performance. Constructed from polyacrylate, the seal offers resistance to heat and wear, extending service life under demanding operating conditions.

With an inside diameter of 1.654 inches (42 mm) and an outside diameter of 2.843 inches (72.2 mm), this seal fits precisely into the housing bore of 2.835 inches (72 mm). The flanged outside diameter of 3.146 inches (79.9 mm) provides secure mounting and stability during operation. The overall width, including the side lip, measures 0.616 inches (15.65 mm), ensuring a tight fit and effective sealing surface.

Compatible Vehicles and Applications

This automatic transmission output shaft seal is compatible with various Ford, Lincoln, Mazda, and Mercury models, including:

• Ford Escape, Explorer, Fusion
• Lincoln Mariner, MKX, MKZ
• Mazda Tribute

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

Common Issues Addressed by the National 710706 Seal

• Prevents transmission fluid leaks from the output shaft area
• Reduces risk of transmission damage due to fluid loss
• Minimizes contamination ingress into the transmission system
• Helps maintain proper hydraulic pressure within the transmission
• Addresses wear-related seal failures in automatic transmissions

Installation Notes and Tips

• Ensure the housing bore is clean and free of debris before installation
• Use appropriate tools to avoid damaging the seal during installation
• Verify correct orientation of the bi-directional lip design for optimal sealing
• Check shaft surface for wear or damage and address as needed
• Apply a light coating of transmission fluid to the seal lips before installation

Quality Assurance and Warranty Information

National transmission seals are manufactured to meet industry standards for durability and performance. The 710706 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.