M.M.
He is becoming a man - dad at this time needs to step up (if he hasn't already) and be his role model and confidante. He needs to give him some hard work to do - like manual labor, work with his hands kind of stuff - rebuilding engines, building something, etc.
I'm sure the son picks up on the different treatment, and that might fuel the rebellion. You've got to show love, no matter what he is showing you. Our kids have to be convinced that we love them unconditionally. I know it's hard when they're testing you - but start with noticing and commenting on anything (no matter how small and insignificant you might think it is) that he is doing RIGHT.