National HM89411 Differential Pinion Race - Rear Outer

Overview of National HM89411 Differential Pinion Race

The National HM89411 differential pinion race is engineered for reliable driveline performance in select Ford and Lincoln vehicles. Designed as a taper bearing cup, this component ensures precise fitment and durability for models such as the Ford F-150, Expedition, and Lincoln Navigator.

• Compatible with Ford and Lincoln models including F-150, E-150 Econoline, Expedition, Mustang, and Navigator
• Part number HM89411 for accurate identification and replacement
• Cup bore diameter of 3.0000 inches (76.2 mm) for precise seating
• Cup length measures 0.9063 inches (23.02 mm) ensuring proper bearing support
• Cup radius of 0.0310 inches (0.787 mm) designed for optimal bearing contact

Technical Specifications and Design Details

This National differential pinion race features a taper bearing cup design, critical for maintaining the correct preload and alignment of the pinion bearing within the differential assembly. The 3.0000 inch (76.2 mm) cup bore diameter matches OEM specifications for a secure fit. With a cup length of 0.9063 inches (23.02 mm), it provides adequate surface area to support bearing loads. The cup radius of 0.0310 inches (0.787 mm) is engineered to complement the bearing geometry, reducing wear and extending service life.

Compatible Vehicles and Applications

This part is compatible with a range of Ford and Lincoln vehicles, including:

• Ford F-150, F-150 Heritage, F-250, F-250 Super Duty, F-350, F-350 Super Duty
• Ford E-150, E-150 Club Wagon, E-150 Econoline, E-150 Econoline Club Wagon
• Ford Excursion, Expedition, Mark LT, Transit-150, Transit-250, Transit-350, Transit-350 HD
• Lincoln Blackwood, Navigator, Mustang

Common Issues Addressed by the HM89411 Differential Pinion Race

• Eliminates excessive play or looseness in the differential pinion bearing
• Prevents premature bearing wear due to improper fit or damage
• Restores proper bearing preload and alignment for smooth driveline operation
• Reduces noise and vibration caused by worn or damaged pinion races
• Supports overall differential longevity and performance

Installation Notes and Tips

• Ensure the differential housing is clean and free of debris before installation
• Use appropriate tools to press the pinion race evenly into the bore to avoid damage
• Verify the cup bore and length dimensions match OEM specifications for your vehicle
• Check bearing condition and replace if necessary during installation
• Follow vehicle-specific torque and preload procedures for the pinion bearing assembly

Quality Assurance and Warranty Information

National parts are manufactured to meet or exceed OEM standards for fit and function. The HM89411 differential pinion race undergoes rigorous quality control to ensure durability and performance in demanding driveline applications. Warranty coverage details should be confirmed with the original equipment manufacturer or authorized distributor.