I just put on aftermarket rotors, with thanks fully to this forum on brake application . I followed steps to a T but now i have a weak grinding type noise (which sounds like its coming from just the rear wheels). I doesn't do it when i start the car, but after a little bit of me toying with it it does. It happens all the time but it appears to not be messing with my braking because the car is easy to push and make roll. Any thoughts? please hit me back asap!!!!