National 7457N Differential Pinion Seal - Rear Outer

Overview of National 7457N Differential Pinion Seal

The National 7457N differential pinion seal is engineered to provide reliable sealing performance for driveline applications. Designed for select Chevrolet, Ford, and Pontiac models, this oil seal helps maintain proper lubrication and prevent leaks in the differential assembly.

• Inside diameter: 1.656 inches (42.060 mm)
• Outside diameter: 2.627 inches (66.730 mm)
• Thickness/width: 0.455 inches (11.560 mm)
• Material: durable polyacrylate for effective sealing
• Redicoat surface treatment for enhanced wear resistance
• Series: 7000, Type: 1s
• Compatible with Chevrolet Camaro, Ford E-100 Econoline, Ford Econoline, Pontiac Firebird, and Pontiac GTO

Product Specifications and Features

The 7457N differential pinion seal features a precise inside diameter of 1.656 inches (42.060 mm) and an outside diameter of 2.627 inches (66.730 mm), ensuring a secure fit within the housing bore measuring approximately 2.623 inches (66.620 mm). Its 0.455-inch (11.560 mm) thickness provides a robust barrier against oil leakage. Constructed from polyacrylate, this seal offers chemical resistance and durability under typical driveline operating conditions. The Redicoat treatment enhances the seal’s surface, reducing wear and extending service life.

Applications and Compatibility

This differential pinion seal is compatible with various driveline systems in Chevrolet, Ford, and Pontiac vehicles. Specifically, it fits models such as the Chevrolet Camaro, Ford E-100 Econoline, Ford Econoline, Pontiac Firebird, and Pontiac GTO. The part number 7457N ensures correct identification for replacement needs in these vehicles.

• Prevents oil leaks in differential pinion shafts
• Maintains lubrication integrity within the differential housing
• Reduces contamination ingress to protect internal components
• Helps avoid premature wear of driveline parts
• Supports smooth differential operation and vehicle performance

Installation Notes and Tips

When installing the National 7457N differential pinion seal, ensure the housing bore and shaft surfaces are clean and free of debris. Proper alignment during installation is critical to avoid seal damage. Use appropriate tools to press the seal evenly into the housing bore without distortion. Verify the seal’s orientation matches the original part to maintain effective sealing. Lubricate the seal lip lightly with gear oil before installation to reduce initial wear.

Quality Assurance and Warranty

National manufactures the 7457N differential pinion seal to meet industry standards for durability and performance. The polyacrylate material and Redicoat treatment contribute to consistent sealing under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the product’s reliability.