kkyle08

My dad has an '05 F150 4x4, For the past few weeks every few miles it sounds like the brake squeakers go off for a few seconds then it stops and then does it again a few miles down the road. Yesterday we were going and it started doing it and so out of a hunch we threw it in 4x4 and it stopped doing it. So when we got home my dad checked the pad and rotors they we perfect and we're puzzled on what it is, any help?