National 710705 Automatic Transmission Output Shaft Seal - Right

Reliable Automatic Transmission Output Shaft Seal for Ford and Mazda Vehicles

The National 710705 automatic transmission output shaft seal is engineered to provide a precise fit and durable sealing performance for select Ford, Lincoln, Mazda, and Mercury models. Designed with a bi-directional lip, this seal helps maintain transmission fluid integrity and prevents leaks in critical drivetrain components.

• Inside diameter: 2.241 inches (57.000 mm)
• Outside diameter: 2.843 inches (72.200 mm)
• Thickness: 0.335 inches (8.500 mm)
• Material: Polyacrylate for enhanced wear resistance
• Bi-directional helix lip design for effective sealing under varying pressures
• Overall width with side lip: 0.354 inches (9.000 mm)
• Compatible with Ford EcoSport, Edge, Escape, Fusion, Lincoln MKC, MKX, MKZ, Mazda Tribute, Mercury Mariner, and Milan

Technical Details and Material Specifications

The National 710705 output shaft seal features a polyacrylate construction, chosen for its resistance to heat, oil, and wear, ensuring long-lasting performance in automatic transmissions. The seal’s bi-directional helix lip design provides a secure barrier against fluid leakage in both rotational directions, which is critical for maintaining transmission efficiency and preventing contamination. With an inside diameter of 2.241 inches and an outside diameter of 2.843 inches, this seal fits precisely into the housing bore of 2.835 inches (72.000 mm), ensuring a tight and reliable fit.

Applications and Common Issues Addressed

• Prevents automatic transmission fluid leaks from the output shaft area
• Reduces risk of transmission damage caused by fluid loss
• Helps maintain proper transmission pressure and performance
• Addresses wear-related seal failures in Ford Edge and Lincoln MKZ models
• Suitable replacement for transmission output shaft seal leaks in Mazda Tribute and Mercury Mariner

Installation Notes and Tips

When installing the National 710705 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 bore without damaging the sealing lip. Verify the seal orientation matches the bi-directional lip design to optimize sealing performance. It is recommended to inspect related transmission components for wear or damage during replacement.

Quality Assurance and Warranty

National transmission seals are manufactured to meet OEM specifications, providing reliable sealing solutions for automatic transmissions. The 710705 part number undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details are not provided, National products are generally backed by industry-standard warranties covering manufacturing defects.