ok so my supercharger coupler is going bad. and it makes that noise...ya know like marbles clanging around in a jar. I took off hard the other day and I thought i had yet again busted my flex pipe section of my down pipe. but my car sounds the same..... only thing now is if im doing rolls and under full throttle my car makes a weird noise as I change from 2nd to 3rd... i cant really describe it other than a buzz.. could it be the coupler? its only during the duration of the actually changing of gears.

 

does it pop out of gear or is it more notchy feeling then before? i'd stop doing runs until you fix the issue

 

thats the thing though everything feels fine. shifter moves the same, car sounds the same. just that noise when i switch gears from 2nd to 3rd while gunnin' it. when i casually drive theres no sound