National 3622 Manual Transmission Output Shaft Seal - Left or Right

National 3622 Manual Transmission Output Shaft Seal Overview

The National 3622 manual transmission output shaft seal is engineered to provide reliable sealing performance for select Ford, Lincoln, Mazda, and Mercury vehicles. Designed with precision dimensions and durable polyacrylate material, this oil seal helps maintain transmission integrity by preventing fluid leaks and contamination.

• Inside diameter: 1.654 inches (42.000 mm)
• Outside diameter: 2.524 inches (64.140 mm)
• Flanged outside diameter: 2.805 inches (71.247 mm)
• Thickness/width: 0.394 inches (10.000 mm)
• Sealing material: Polyacrylate with bi-directional lip design
• Compatible with housing bore diameter: 2.520 inches (64.000 mm)
• Redicoat surface treatment for enhanced durability
• Part number: 3622, Series 3000

Technical Details and Material Specifications

This National 3622 output shaft seal is constructed from polyacrylate, a material known for its resistance to heat, oil, and wear. The seal features a bi-directional lip design that ensures effective sealing against fluid leakage in both rotational directions of the manual transmission output shaft. The flanged outside diameter of 2.805 inches (71.247 mm) allows for secure installation within the transmission housing bore of 2.520 inches (64.000 mm). The 0.394 inch (10.000 mm) thickness provides a robust barrier to maintain transmission fluid containment under operating conditions.

Compatible Vehicles and Applications

This output shaft seal is compatible with a range of Ford, Lincoln, Mazda, and Mercury models, including but not limited to:

• Ford Escape, Escort, Freestar, Taurus, Tempo, Windstar
• Lincoln Continental, LS, Town Car
• Mazda 626, MX-6, Probe, Tribute
• Mercury Cougar, Lynx, Mystique, Sable, Topaz, Tracer

Use the National 3622 seal when servicing manual transmissions on these vehicles to ensure proper fit and function.

Common Issues Addressed by the National 3622 Seal

• Prevents manual transmission fluid leaks from the output shaft area
• 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 consistent transmission performance and longevity

Installation Notes and Tips

• Verify the housing bore and shaft dimensions match the seal specifications before installation
• Clean the installation area thoroughly to remove debris and old sealant
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Inspect the shaft surface for wear or damage that could compromise the seal
• Apply a light coating of transmission fluid to the seal lip before installation to reduce initial wear

Quality Assurance and Warranty Information

The National 3622 manual transmission output shaft seal is manufactured to meet industry standards for durability and performance. It includes a Redicoat surface treatment to enhance corrosion resistance and longevity. This part is backed by National's quality assurance protocols, ensuring reliable operation when installed according to specifications. Warranty coverage details are available through the manufacturer and should be reviewed prior to installation.