National 222742 Manual Transmission Input Shaft Seal

Overview of National 222742 Manual Transmission Input Shaft Seal

The National 222742 manual transmission input shaft seal is engineered to provide reliable sealing performance for a range of vehicles including Acura, Ford, Honda, Hyundai, Mazda, Mercury, and Nissan models. Designed with precision dimensions and durable fluoro-elastomer material, this oil seal helps maintain transmission integrity and prevent fluid leaks.

• Inside diameter: 1.063 inches (27.000 mm)
• Outside diameter: 1.657 inches (42.100 mm)
• Thickness/width: 0.276 inches (7.000 mm)
• Material: Fluoro-elastomer for enhanced chemical and temperature resistance
• Compatible with multiple manual transmission applications across popular vehicle models

Technical Specifications and Material Details

The National 222742 input shaft seal features a 1.063-inch (27 mm) inside diameter and a 1.657-inch (42.1 mm) outside diameter, with a thickness of 0.276 inches (7 mm). Constructed from fluoro-elastomer, this seal offers excellent resistance to heat, oil, and other transmission fluids, ensuring long-lasting performance in demanding manual transmission environments. The housing bore measures approximately 1.654 inches (42 mm), matching OEM specifications for a secure fit.

Compatible Vehicles and Applications

This manual transmission input shaft seal is compatible with a variety of vehicles, including Acura Integra, Honda Accord, Civic, CRX, Prelude, and Civic del Sol; Ford Focus and Contour; Hyundai Tiburon and Elantra; Mazda 3 and 3 Sport; Mercury Cougar and Mystique; and Nissan Altima, Maxima, Sentra, Tracer, and Versa. The part number 222742 ensures precise fitment for these models, helping maintain transmission fluid containment and shaft protection.

Common Issues Addressed by the National 222742 Seal

• Prevents manual transmission fluid leaks around the input shaft
• Reduces contamination ingress that can cause premature transmission wear
• Maintains proper lubrication within the transmission system
• Helps avoid costly transmission repairs due to seal failure
• Ensures smooth operation of the input shaft by maintaining a tight seal

Installation Notes and Tips

• Ensure the transmission housing bore is clean and free of debris before installation
• Use appropriate tools to press the seal evenly into place without distortion
• Verify the seal orientation matches OEM specifications to prevent leaks
• Inspect the input shaft for wear or damage prior to installing the new seal
• Apply a light coating of transmission fluid to the seal lip to ease installation

Quality Assurance and Warranty Information

National's 222742 input shaft seal is manufactured to meet strict quality standards, using durable fluoro-elastomer material to withstand harsh transmission environments. This part is part of the National 220000 series, known for consistent performance and reliability. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the product's durability and fitment.