National KC-11445-Y Axle Differential Bearing - Front or Rear

National KC-11445-Y Axle Differential Bearing Overview

The National KC-11445-Y axle differential bearing is engineered for reliable driveline performance in a variety of vehicles including Toyota 4Runner, Chevrolet Corvette, and Nissan Pathfinder. This taper bearing set is designed to meet precise specifications for cone and cup dimensions, ensuring proper fit and function in compatible axle assemblies.

• Taper bearing set with cone bore diameter of 1.6626 inches (42.23 mm)
• Cone length measures 0.8125 inches (20.638 mm) with a radius of 0.0787 inches (2.0 mm)
• Cup bore diameter of 3.1490 inches (79.985 mm) and cup length of 0.5937 inches (15.08 mm)
• Standout dimension of 0.1875 inches (4.762 mm) for accurate bearing positioning
• Width of 0.7812 inches (19.842 mm) for proper axle differential fitment

Detailed Product Description and Specifications

The National KC-11445-Y axle differential bearing set includes both the taper bearing cone (part number 17887) and cup (part number 17831), which are not available separately. This bearing set is designed to provide smooth rotation and support for the axle differential, reducing friction and wear. The precise cone bore and cup bore dimensions ensure compatibility with axle assemblies on a range of vehicles such as the Toyota Land Cruiser, Chevrolet Bel Air, and Nissan D21. The standout and width measurements contribute to proper bearing preload and alignment within the differential housing.

Compatible Vehicles and Applications

This axle differential bearing set is compatible with multiple makes and models, including but not limited to:

• Toyota 4Runner, Land Cruiser, Corolla, Supra
• Chevrolet Corvette, Bel Air, Skylark
• Nissan Pathfinder, D21, QX4
• Buick Century, Roadmaster
• GMC Pickup, Power Ram 50

Common Issues Addressed by KC-11445-Y Bearing Set

• Excessive axle noise due to worn or damaged differential bearings
• Uneven or rough rotation of the axle differential
• Increased friction causing premature wear of driveline components
• Axle play or looseness affecting vehicle handling and safety
• Failure of axle differential bearing leading to drivetrain damage

Installation Notes and Tips

• Ensure proper cleaning and inspection of axle housing before installation
• Use correct tools to press the taper bearing cone and cup into place
• Verify bearing preload and adjust as necessary according to vehicle service manual
• Do not attempt to separate cone and cup components as they are sold as a set
• Consult vehicle-specific repair guides for torque specifications and alignment procedures

Quality Assurance and Warranty Information

National axle differential bearings are manufactured to meet industry standards for durability and performance. The KC-11445-Y bearing set undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects. Refer to the product documentation or manufacturer for exact warranty terms.