National 4528N Manual Transmission Output Shaft Seal

Overview of National 4528N Manual Transmission Output Shaft Seal

The National 4528N manual transmission output shaft seal is engineered to provide reliable sealing performance for select Chevrolet, Dodge, GMC, and Jeep vehicles. Designed with durable polyacrylate material and a counter-clockwise spiral lip, this seal helps maintain transmission integrity and prevent fluid leaks.

• Constructed from high-quality polyacrylate for durability and resistance
• Counter-clockwise spiral lip design for effective sealing
• Inside diameter of 1.890 inches (48.000 mm) to fit specific shafts
• Outside diameter of 2.565 inches (65.150 mm) matching housing bore requirements
• Thickness of 0.965 inches (24.500 mm) for proper fit and function
• Redicoat surface treatment for enhanced corrosion resistance
• Compatible with multiple Chevrolet, Dodge, GMC, and Jeep models

Detailed Product Description and Specifications

The National 4528N output shaft seal is part of the 4000 series and is designed specifically for manual transmissions. Its polyacrylate construction offers excellent wear resistance and flexibility, ensuring a tight seal around the transmission output shaft. The seal features a counter-clockwise spiral lip design that improves oil retention and reduces the risk of leaks under various operating conditions. With an inside diameter of 1.890 inches (48.000 mm) and an outside diameter of 2.565 inches (65.150 mm), this seal fits housing bores measuring approximately 2.559 inches (65.000 mm). The thickness of 0.965 inches (24.500 mm) ensures a secure fit within the transmission assembly. Additionally, the Redicoat coating provides added protection against corrosion, extending the service life of the seal.

Compatible Vehicles and Applications

This manual transmission output shaft seal is compatible with a range of Chevrolet, Dodge, GMC, and Jeep models, including:

• Chevrolet Blazer, C1500, C2500, C3500, S10, S10 Blazer, S15, S15 Jimmy, Silverado 1500, Silverado 1500 Classic, Sierra 1500, Sierra 1500 Classic, Sonoma
• Dodge Dakota, Ram 1500, Ram 2500
• GMC Jimmy, K1500, K2500, K3500
• Jeep Liberty

Common Issues Addressed by the National 4528N Seal

• Prevents manual transmission fluid leaks from the output shaft area
• Reduces contamination ingress that can damage transmission components
• Maintains proper lubrication within the transmission system
• Helps avoid premature wear of transmission bearings and gears
• Ensures consistent transmission performance and longevity

Installation Notes and Tips

• Verify the shaft and housing bore dimensions before installation to ensure compatibility
• Clean the shaft and bore thoroughly to remove debris and old sealant
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Inspect the seal lip for damage before installation
• Apply a light coating of transmission fluid to the seal lip to aid initial lubrication

Quality Assurance and Warranty

National manufactures the 4528N output shaft seal to meet industry standards for durability and performance. The seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. This product includes a limited warranty against defects in material and workmanship, providing confidence in its reliability for manual transmission applications.