Afa Motors Hub Assembly Fits for Front Position, with 6 Lug, with ABS Sensor. The Wheel Bearing & Hub Assemblies Constructed from Premium Materials and Exceed the Quality of the Original Bearings, the Superior Seals can Smoothly Rotate and Keep the Wheel Attached to the Vehicle, Guiding Precise Steering and Ensuring Driving Safety. Fitment: For FORD F-150 2004 - [4WD; 6 Stud]For FORD F-150 2005 - [4WD; 6 Stud; Built Before 11/29/04 Production Date aa]For FORD F-150 2006-2008 - [4WD; 6 Stud]For LINCOLN MARK LT 2006-2008 - [4WD; 6 Stud]For FORD EXPEDITION 2003-2006 - [4WD]For LINCOLN NAVIGATOR 2003-2006 - [4WD] Notice - This wheel bearing Only Fits for Front Position, with 6 Lugs Kit Includes- 2 x Wheel Hub and Bearing Assembly - 515043 Specifications Bolt Circle Diameter (IN) 5.275 Bolt Circle Diameter (MM) 135.000 Brake Pilot Diameter (MM) 90.000 Flange Bolt Hole Quantity 4 Flange Diameter (MM) 183.000 Flange Offset (MM) 45.600 Flange Shape Square Hub Pilot Diameter (MM) 99.300 Spline Quantity 45 Wheel Pilot Diameter (MM) 86.800 Wheel Stud Quantity 6 Seals Design Multi-lip Design Configuration and Extreme Temperature Seal Materials Keep Dirty out to Effectively Provide Smooth and Safe Driving. Maintenance-Free Our Wheel Bearings are Designed to be Totally Maintenance-Free. Since They are Filled with Grease Which will Provide Sufficient Lubrication for the Rolling Elements for the Entire Service Life of the Wheel Bearing. Meet OEM Quality Vibration-Free Wheel Bearing and Hub Assemblies are Machined to Meet Optimum Performance. Also Improved Those Traditional Design Weaknesses. Precision Processes The Manufacturing Processes Used to Work Quality Steel into a Finished Product Includes Forging, Turning, Heat-Treating, Grinding and Polishing; They are Critical to the Quality of the End Product. The Symptoms of Bad Wheel Bearings Include: -Noise: A Humming, Rumbling or Growling Noise that Increases with Acceleration or as the Vehicle Turns. A Loud Constant Whining or Grinding Noise When the Vehicle is in Motion. Clunking Noises When Driving Over Uneven Road Surfaces. -Looseness, Excessive Play in the Steering Wheel (Vague Steering); -Steering Wheel Vibration Which Changes with the Vehicle Speed or As the Vehicle Turns; -ABS Malfunctioning, Warning Light. ABS System Issues Can Be Related to Failure of the ABS Sensor That is Integrated in the Wheel End Bearing.