National 714655 Manual Transmission Input Shaft Seal

Overview of National 714655 Manual Transmission Input Shaft Seal

The National 714655 manual transmission input shaft seal is engineered to provide reliable sealing performance for select Chevrolet, Dodge, and GMC vehicles. Designed with durable polyacrylate material and a clockwise-spiral lip design, this oil seal helps maintain transmission integrity by preventing fluid leaks.

• Constructed from high-quality polyacrylate for durability and resistance
• Clockwise-spiral lip design enhances sealing efficiency
• Inside diameter of 1.375 inches (34.930 mm) fits specific manual transmission shafts
• Outside diameter measures 1.989 inches (50.520 mm) for precise housing bore fitment
• Thickness of 0.252 inches (6.400 mm) ensures proper sealing depth
• Redicoat feature for improved corrosion resistance
• Compatible with Chevrolet Blazer, C1500, C2500, C3500, GMC Yukon, Tahoe, and Dodge Ram 1500, 2500, 3500 models

Detailed Product Description

The National 714655 manual transmission input shaft seal is part of the 714000 series, designed specifically for manual transmissions requiring a 48-type seal. Its polyacrylate construction offers excellent wear resistance and flexibility, essential for maintaining a tight seal around the input shaft. The clockwise-spiral lip design helps to effectively prevent oil leakage by directing fluid back into the transmission housing. With an inside diameter of 1.375 inches and an outside diameter of 1.989 inches, this seal fits housing bores measuring approximately 1.981 inches, ensuring a secure and precise installation. The Redicoat coating adds an extra layer of protection against corrosion, extending the service life of the seal in demanding operating conditions.

Applications and Problem Solving

• Prevents manual transmission fluid leaks in Chevrolet, Dodge, and GMC vehicles
• Reduces risk of contamination entering the transmission system
• Helps maintain proper lubrication of the input shaft
• Addresses wear and tear issues caused by shaft movement and heat
• Replaces worn or damaged seals to restore transmission performance

Installation Notes and Tips

• Ensure the transmission input shaft and housing bore are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Verify the seal’s orientation matches the clockwise-spiral lip design for optimal sealing
• Inspect the shaft for wear or damage prior to installing the new seal
• Follow vehicle manufacturer torque specifications and service procedures during reassembly

Quality Assurance and Warranty

National transmission seals are manufactured to meet industry standards for durability and performance. The 714655 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 in Chevrolet Blazer, Dodge Ram, and GMC Yukon models.