National 710700 Automatic Transmission Output Shaft Seal - Right

Overview of National 710700 Automatic Transmission Output Shaft Seal

The National 710700 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 materials, this oil seal helps maintain transmission integrity and prevent fluid leaks.

• Inside diameter: 1.654 inches (42.000 mm)
• Outside diameter: 3.118 inches (79.200 mm)
• Thickness: 0.394 inches (10.000 mm)
• Material: Fluoro-elastomer for enhanced chemical and temperature resistance
• Bi-directional lip design for effective sealing in both rotational directions
• Overall width with side lip: 0.551 inches (14.000 mm)
• Housing bore compatibility: 3.110 inches (79.000 mm)

Detailed Product Description

The National 710700 transmission output shaft seal is constructed from fluoro-elastomer, a material known for its resistance to heat, oil, and wear, making it suitable for demanding transmission environments. Its bi-directional lip design ensures a secure seal around the output shaft, preventing transmission fluid leaks that can lead to performance issues. The seal’s precise dimensions, including a 1.654-inch inside diameter and 3.118-inch outside diameter, are tailored to fit specific transmission housings with a 3.110-inch bore, ensuring a proper fit and reliable operation.

Compatible Vehicles and Applications

This output shaft seal is compatible with various models from Ford, Hyundai, Lincoln, Mazda, and Mercury, including the Ford Fusion, Lincoln MKZ, Mazda CX-7 and CX-9, Hyundai Veracruz, and Mercury Milan. The part number 710700 corresponds to this specific seal, making it a suitable replacement for maintaining transmission performance in these vehicles.

Common Issues Addressed by the National 710700 Seal

• Prevents automatic transmission fluid leaks around the output shaft
• Reduces risk of transmission contamination from external debris
• Maintains proper fluid pressure within the transmission system
• Minimizes premature wear of transmission components due to fluid loss
• Helps avoid costly transmission repairs related to seal failure

Installation Notes and Tips

• Ensure the transmission housing bore measures approximately 3.110 inches for proper fitment
• Clean the shaft and housing surfaces thoroughly before installation to prevent seal damage
• Use appropriate tools to press the seal evenly into place without distortion
• Verify the bi-directional lip is correctly oriented to maintain effective sealing
• Inspect the shaft for wear or damage that could compromise seal performance

Quality Assurance and Warranty

National transmission seals are manufactured to meet industry standards for durability and performance. The 710700 seal is made from high-quality fluoro-elastomer material to withstand harsh operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the product’s reliability.