My driverside rotor was trashed to i replaced my pads and my driverside rotor (passenger was like new still) anyway... Now i have this wierd swishing sound from the front driver wheel area.. It goes away at higher speeds(or you cant hear it anymore) and hitting the brakes doesent seem to make any diffrence on its presense.. Could my caliper be sticking and dragging the pads just a little? or is this noise more likely a wheel bearing? also whets the deal with no cotter pin for the bearing nut? do the prongs bend outwords then you can take it off? thanks