The front hub would be thinner there on a 2001.
In the middle of March 99, Ford increased the thickness of the rotor mounting flange, and decreased the corresponding thickness of the hub where the rotor mounts to keep the wheel in the same place. This was supposedly to keep the brake rotors from warping. The only difference in the early and late hub and rotor combination is the location of the mating surface of the two.
Usually, the parts stores only carry the later hub/bearing assemblies, and you have to go to Ford for the earlier one.
In the middle of March 99, Ford increased the thickness of the rotor mounting flange, and decreased the corresponding thickness of the hub where the rotor mounts to keep the wheel in the same place. This was supposedly to keep the brake rotors from warping. The only difference in the early and late hub and rotor combination is the location of the mating surface of the two.
Usually, the parts stores only carry the later hub/bearing assemblies, and you have to go to Ford for the earlier one.