Hey everyone....Ive been having this problem for the past 20,000 miles and I still can't figure it out...Ill be driving around time and when I give my 2004 GTP 1/2 throttle my RPM's will start to bounce and the car starts to shake because of it....took the tranny pan off and no big shavings or anything so I'm wondering if it has to do with the engine....any answers will be appreciated.