Thats the frustrating part it's hard to tell since i'm in the drivers seat and it sounds liek it's everywhere. Thats why i tried parking the car and reving the engine while outside to pin point the exact spot, but it won't make that noise while parked. I recently installed my injen intake and was poking around the exhaust to see if anything was loose and i did manage to shake the piping around a bit to see if i heard anything. Whats odd is i haven't heard the noise much lately ever sine then. I still have a feeling it'll come around. So i guess what we have is that it only occures when driving, and when i mean driving is when i'm pressing the accelerator and gets louder when about to shift gears then stops momentarly until i'm picking up speed again for the next gear. I don't believe its the tranny since the shifting is smooth, and don't feel anything awkward during any shifting from gear to gear(automatic). Sorry for the confusion:/.