J.C. Whitney JF283712 Front Wheel Hub Assembly 5-Lug 5x114.3mm PCD with Bearing

The J.C. Whitney JF283712 is a direct-fit front wheel hub assembly engineered as an OEM replacement (replaces Ford OE part number 8L8Z1104A, also cross-referenced as 4L8Z1104AA, 6L8Z1104A, and YL8Z1104AB). This hub assembly restores the secure, smooth connection between the drivetrain and the wheel, eliminating symptoms such as grinding noises, steering wheel vibrations, and wheel wobble associated with worn or failing hub components.

This assembly is designed for the front axle and fits both the driver and passenger side (RH = LH). It features a 5-lug bolt pattern with a 5 x 114.3mm (5 x 4.50 in.) pitch circle diameter (PCD), with a flange bolt thread size of M12x1.5 and 28 axle splines.

Kit Includes:

• Pre-assembled wheel hub unit
• Pre-installed wheel bearing
• Snap ring
• Retaining nut

Key Specifications:

• Position: Front — Driver or Passenger Side
• Lug Count: 5 Lugs
• Bolt Pattern (PCD): 5 x 114.3mm (5 x 4.50 in.)
• Flange Bolt Thread Size: M12x1.5
• Axle Splines: 28
• OEM Reference: 8L8Z1104A, 4L8Z1104AA, 6L8Z1104A, YL8Z1104AB, YL8Z1215AA
• Interchange Part Number: 518515

This hub assembly is built to meet or exceed OEM production standards, providing a reliable, like-for-like replacement that installs without the need for custom fabrication or modification.