i noticed that when i replaced my rear rotors on my 2000 firebird that the drivers rear pads were wore at at angle i replaced both rotors and pads greased the slides and reassbled but it still makes a scraping sound while im driveing is it a bad caliper the wear on the rotor seems to be even al the way across?

 

u may have a sticking caliper. or bad guides

 

Do a search on caliper spread. Sounds like that is your issue.