in my gsr when im at high rpms I have this loud noise its like a rumble jumble it sounds realy bad. i just had a rear mount worked on it was coming loose. But it doesnt sound anything like that loud bang noise it was creating when i stepped on it before. This sound is like a metal on metal. Also my shifter is grinding on something at the same time the rumble occurs. all comments appreciated.

 

get your *** up under that bad boy and visually inspect for any obvious problems first

also open the hood and have someone rev it up and listen more closely to the sound and see where it's coming from..that might give you a place to start as far as what needs to be done to further diagnose the problem(s)

 

will do man. thanks.