I know it's kinda hard to do without actually hearing it but I really need some input on this one. To describe the noise it sounds like something rolling around inside my bellhousing (AOD tranny) sounds very scary actually! It'll make the noise at all times regardless of load or rpms. It'll speed up with rpms and when the car is turned off it'll graudlly roll down even after the engine is stopped. To mimic the sound best I'd say put a bolt in a metal Folgers coffee can and roll it around in side. I can swear it sounds like it's coming from my bellhousing but I don't know what it could be. An input would be great car is a 91 GT with AOD tranny.