this has been happening for a while now. but it only happens at certain points when im driving. say i were to take a turn then start to give it gas and it would rev up to like 3000 then right when it shifts, u can hear this clicking type of noise, like an electrical click, in the back driver side speaker. its agravating and everytime i take some along to listen to it, it never happens. im thinkin maybe a bad ground? it only does it when im going slow to fast right when it shifts. plz help, thanks