Well, I know that this is not a Turbo car, but I was wondering what this noise may be, and it seems to be coming from the area that the trans is in. But what the noise sounds like is a slight rattling at an idle. It is not always there and only comes around when either the car is warm or when there is a lot of power using devices being used, such as the windows, moon roof, A/C, and even when the transmission is in gear and I am stepping on the brakes. I was just wondering what the problem may be, since I didn't know if it could be the clutch packs rattling or something else. The drivability of the car has not been altered, and I am more then open to options of it being other then the trans. Thanks for any help.