Ford: 2002 F150 XLT FX4 issue, wheel bearings, f150 xlt

Question
I just bought a 2002 F150 XLT FX4.

Under normal braking, everything is fine.

However, when I am at speeds of say 55+MPH and I brake a littler harder than normal (nothing extreme just harder than normal), then I get a vibration in the steering wheel until I get back below around 45MPH.

Is this a warped rotor?  More likely the front?  Would it make sense that I don't get this shimmy other times if it is a warped rotor?

Or is this possibly another problem?  Worn wheel bearings?  Bad idler arm?  Ball joint?  ABS?  Other?


Answer
sorry it took so long to get back they had a problem with my sign in.Yes it sounds like you may have to have your rotors reface or replaced now to find out if it is the front or back have them do a rotor run-out if you have drums in the rear then it is in the front.