National 713771 Manual Transmission Input Shaft Seal - Front

Reliable Manual Transmission Input Shaft Seal for Acura and Ford Models

The National 713771 manual transmission input shaft seal is engineered to provide durable sealing performance for a range of vehicles including Acura Accord, Ford F-150, and Volkswagen Passat. Designed with precision dimensions and high-quality materials, this oil seal helps maintain transmission integrity and prevent fluid leaks.

• Inside diameter: 1.378 inches (35.000 mm)
• Outside diameter: 1.982 inches (50.340 mm)
• Thickness: 0.276 inches (7.000 mm)
• Material: Fluoro-elastomer for enhanced chemical and heat resistance
• Helix type: Clockwise-spiral lip design for effective sealing
• Housing bore diameter: 1.969 inches (50.000 mm)
• Part number: 713771, Series 713000

Durable Construction and Precise Fitment

This National manual transmission input shaft seal is constructed from fluoro-elastomer, a material known for its resistance to heat, oil, and chemicals commonly found in automotive transmissions. The clockwise-spiral lip design ensures a tight seal around the input shaft, reducing the risk of leaks and contamination. With exact inside and outside diameters, this seal fits securely within the housing bore, maintaining transmission fluid integrity. The 7 mm thickness provides a robust barrier against wear and pressure fluctuations.

Compatible Vehicles and Applications

This input shaft seal is compatible with a variety of makes and models, including Acura Accord, Buick Skylark, Chevrolet Cavalier, Ford F-150, Honda Accord, Mazda Tribute, Mercedes-Benz C220, Mercury Cougar, Oldsmobile Cutlass Supreme, Pontiac Grand Prix, and Volkswagen Passat. It is designed specifically for manual transmissions requiring a 35 mm shaft seal, making it suitable for many common transmission repair and maintenance tasks.

• Prevents transmission fluid leaks from the input shaft area
• Reduces contamination from dirt and debris entering the transmission
• Helps maintain proper lubrication for transmission components
• Addresses wear-related seal failures in manual transmissions
• Supports reliable operation of manual transmission systems

Installation Notes and Tips

When installing the National 713771 input shaft seal, ensure the transmission housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip. Verify the shaft diameter matches the 1.378 inch (35 mm) specification for proper fit. Lubricate the seal lip lightly with transmission fluid before installation to reduce initial wear. Follow vehicle-specific service manual instructions for removal and installation procedures.

Quality Assurance and Warranty

National manufactures this input shaft seal to meet industry standards for durability and performance. The use of fluoro-elastomer material and precise engineering ensures long service life under normal operating conditions. Part number 713771 is part of the 713000 series, known for consistent quality in transmission sealing solutions. Warranty coverage details should be confirmed with the original equipment manufacturer or distributor.