National 719316 Differential Pinion Seal - Front Outer or Rear Outer

Overview of National 719316 Differential Pinion Seal

The National 719316 differential pinion seal is engineered to provide reliable sealing performance for driveline applications. Designed for use with Dodge, Ford, and Jeep models, this oil seal helps maintain proper lubrication and prevents leaks in the differential assembly.

• Inside diameter: 1.875 inches (47.630 mm)
• Outside diameter: 2.805 inches (71.240 mm)
• Flanged outside diameter: 3.165 inches (80.390 mm)
• Thickness: 0.530 inches (13.460 mm)
• Overall width with side lip: 0.695 inches (17.650 mm)
• Material: Durable fluoro-elastomer for enhanced resistance to heat and chemicals
• Compatible with shaft diameter of 1.875 inches (47.630 mm)

Technical Details and Specifications

The National 719316 differential pinion seal is part of the 719000 series and is constructed from fluoro-elastomer, a material known for its excellent resistance to high temperatures, oils, and other automotive fluids. The seal features a flanged outside diameter of 3.165 inches (80.390 mm) which ensures a secure fit within the housing bore measuring approximately 2.797 inches (71.040 mm). Its precise dimensions, including a thickness of 0.530 inches (13.460 mm) and an overall width with side lip of 0.695 inches (17.650 mm), provide a tight seal around the pinion shaft to prevent oil leakage and contamination.

Compatible Vehicles and Applications

This differential pinion seal is compatible with a range of Dodge, Ford, and Jeep vehicles, including models such as the Dodge B3500, D250, D350, Ram 2500, Ram 3500 Van, Ford E-250 Econoline, E-350 Super Duty, F-250 HD, F-350 Super Duty, and Jeep Grand Cherokee. It is specifically designed to fit applications requiring a 1.875-inch shaft diameter and is suitable for use in heavy-duty trucks and vans where reliable driveline sealing is critical.

Common Issues Addressed by the National 719316 Seal

• Prevents differential oil leaks that can cause driveline damage
• Reduces contamination from dirt and debris entering the differential
• Maintains proper lubrication for pinion gears and bearings
• Helps avoid costly repairs due to seal failure or wear
• Ensures consistent performance under high temperature and pressure conditions

Installation Notes and Tips

When installing the National 719316 differential pinion seal, ensure the housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the fluoro-elastomer material. Verify the shaft diameter matches the seal’s 1.875-inch specification for proper fitment. Lubricate the seal lip lightly with gear oil before installation to reduce initial wear. Follow vehicle-specific service manual instructions for torque specifications and assembly procedures.

Quality Assurance and Warranty

National manufactures the 719316 differential pinion seal to meet industry standards for durability and performance. The use of fluoro-elastomer material provides enhanced resistance to heat, oil, and chemical exposure, contributing to a longer service life. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in the product’s reliability.