National 1990 Manual Transmission Input Shaft Seal - Outer

Reliable Manual Transmission Input Shaft Seal for Select Vehicles

The National 1990 Manual Transmission Input Shaft Seal is engineered to provide effective sealing for manual transmissions in a variety of vehicles including Chevrolet, Ford, GMC, Isuzu, Kia, Mazda, Mercury, and Pontiac models. Designed with durable polyacrylate material and a clockwise-spiral lip design, this oil seal helps maintain transmission integrity and prevent fluid leaks.

• Inside diameter: 1.063 inches (27.000 mm)
• Outside diameter: 1.703 inches (43.250 mm)
• Thickness: 0.354 inches (9.000 mm)
• Sealing material: Polyacrylate for enhanced durability
• Clockwise-spiral lip design for improved sealing performance
• Redicoat finish for corrosion resistance
• Compatible housing bore: 1.693 inches (43.000 mm)
• Part number: 1990

Durable Construction and Design Features

This National 1990 input shaft seal is constructed from polyacrylate, a material known for its resistance to heat, oil, and wear, making it suitable for demanding transmission environments. The clockwise-spiral lip design ensures a tight seal around the input shaft, reducing the risk of oil leaks that can lead to transmission damage. The redicoat finish adds an extra layer of protection against corrosion, extending the service life of the seal.

Compatible Vehicles and Applications

This manual transmission input shaft seal is compatible with a wide range of vehicles, including Chevrolet S10, Ford Ranger, GMC S15, Isuzu Rodeo, Kia Sephia, Mazda MX-6, Mercury Capri, and Pontiac Sunfire, among others. It is designed to fit manual transmissions requiring a 1.063 inch (27 mm) shaft diameter and a housing bore of approximately 1.693 inches (43 mm).

• Prevents oil leaks in manual transmissions
• Helps maintain proper lubrication of input shaft
• Reduces risk of transmission component wear
• Addresses issues related to worn or damaged seals
• Supports smooth transmission operation and longevity

Installation Notes and Tips

When installing the National 1990 input shaft seal, ensure the transmission housing bore is clean and free of debris. Carefully align the seal to avoid damage to the sealing lip during installation. Use appropriate tools to press the seal evenly into the bore without distortion. Verify the seal’s orientation matches the clockwise-spiral lip design for optimal sealing performance.

Quality Assurance and Warranty

National manufactures the 1990 input shaft seal to meet industry standards for durability and performance. The use of polyacrylate material and redicoat finish reflects a focus on long-term reliability. While specific warranty details are not provided, National products typically adhere to quality control processes to ensure consistent fit and function.