National 711057 Automatic Transmission Output Shaft Seal - Right

Reliable Automatic Transmission Output Shaft Seal for Ford and Lincoln

The National 711057 automatic transmission output shaft seal is engineered to provide a precise fit and durable sealing solution for select Ford and Lincoln vehicles. Designed with a fluoro-elastomer material and a clockwise-spiral lip design, this seal helps maintain transmission fluid integrity and prevents leaks.

• Inside diameter: 1.653 inches (42.000 mm)
• Outside diameter: 2.842 inches (72.200 mm)
• Flanged outside diameter: 3.299 inches (83.800 mm)
• Thickness: 0.512 inches (13.000 mm)
• Overall width with side lip: 0.654 inches (16.600 mm)
• Helix type: Clockwise-spiral lip design for effective sealing
• Material: Durable fluoro-elastomer for resistance to heat and chemicals
• Compatible housing bore: 2.834 inches (72.000 mm)

Detailed Product Description

The National 711057 transmission output shaft seal is specifically designed to fit the output shaft of automatic transmissions in Ford and Lincoln models such as the EcoSport, Edge, Escape, Fusion, MKC, MKT, MKZ, and Transit Connect. Its fluoro-elastomer construction offers excellent resistance to transmission fluids, heat, and wear, ensuring long-lasting performance. The clockwise-spiral lip design enhances sealing efficiency by directing fluid back into the transmission, reducing the risk of leaks and contamination. With precise dimensions including a 1.653-inch inside diameter and a 2.842-inch outside diameter, this seal fits securely within the housing bore of 2.834 inches, maintaining proper alignment and sealing integrity.

Common Applications and Issues Addressed

• Prevents transmission fluid leaks from the output shaft area
• Reduces contamination and debris ingress into the transmission
• Helps maintain proper transmission pressure and fluid levels
• Addresses wear-related seal failures in Ford and Lincoln automatic transmissions
• Supports smooth transmission operation by maintaining fluid integrity

Installation Notes and Tips

• Ensure the transmission output shaft and housing bore are clean and free of debris before installation
• Use appropriate tools to avoid damaging the seal during installation
• Verify the seal orientation matches the clockwise-spiral lip design for optimal sealing
• Check for proper fitment with the specific Ford or Lincoln model before installation

Quality Assurance and Warranty

Manufactured by National, the 711057 output shaft seal meets industry standards for durability and performance. The fluoro-elastomer material and precision engineering provide reliable sealing under demanding operating conditions. While specific warranty details are not provided, National products are known for consistent quality and compatibility with OEM specifications.