I replaced my front rotors and pads on a 1996 toyota corolla. Now I hear a grinding noise when I break in reverse I hear a grinding noise on the driver side brake system. I have taken it apart, dusted everything, verified that no parts was loose.
the noise is intermittent, it doesn't come on all the time but when it does it's pretty loud.
Did you degrease the new rotors before installing the new brakes. Even bran new rotors have a film of lubericant to preserve in shipping. If not you may have spots of embeded oil in the new pads. And it will work its way out after a while. Good luck