Ive heard a slight rettle from time to time after i was sitting at a stop sign and then hit the gas to start moving again, or afgter its been parked a while and i get out and start going. Im not mashing the gas, just a nromal acceleration. Sounds like a rattle from underneath. Not sure how to describe it other than maybe something on or around the exhaust maybe? Im not sure. What would a diff sound like if it was about to take a dump?