I replaced the pads and rotors last summer and they are already warped or something. The front end while braking shakes, pulsates, shimmy or wobbles. How ever you'd say it. Whats up??? Calipers bad? My 99 F250 never has had this problem.

 

sounds like warped rotors to me....it is happening to my truck as of recently. I am taking my truck in on friday to get them turned down (hopefully) otherwise i am going to have to bite the bullet and get new. I have heard that the f150 rotors warp really fast. just my .10