Need help trying to figure out what I been hearing for awhile in my front end. Happens every time I take off half throttle or more theres like this knockin noise in succession(usually like 2 or 3 little knocks) almost like metal on metal or metal against hard plastic. It happens sometimes too when i put the car in reverse it knocks real quick but all the time when I take off harder then usual.Car has 116k miles and drives fine otherwise. Then part 2 of my problem is my rear passenger tire is lumpy-like on the inner edge and when Im braking,especially from high speeds my rear shimys from that deformed tire, I heard its called "cupped tire", what causes that, and any ideas?
