I put disc brakes on my 14 bolt and now have a small problem. After driving for a couple of miles they will start to make a noise, it is difficult to describe but while driving fast it sounds similar to the noise a mud tire makes while driving. While going very slow the noise sounds like when the brakes make a "groan" noise if you are stopped and release just enough pressure to roll a bit, and I can tell that it only makes this noise on a small part of the rotor, the noise gets loud then quiet then loud then... I used new brake hoses, rotors, and calipers and they aren't sticking. When I installed the new rotors the lug studs fit loose in the rotor holes but tight in the hub holes, so I know that the rotors aren't centered. The noise to me seems like a warped rotor. Do the rotors usually need turned before installing the hub/rotor on the truck?