I don't know if its related, but I get that everynow and then, its my exhaust banging up against my heatsheild under there. The BAT y-pipe connects to my SVT cat-back right in the middle of the heatsheild and its kind of tight in there. The torque of the engine/tranny causes the engine/tranny/attachedexhust manifods to vibrate. At least that's my theory. I've been meaning to get under there and adjust the heatsheild a bit so its got more room for "play" and see if that cures it.
I doubt its a tranny issue, at least in my case, I just had a rebuilt trans installed with new half-shafts and quaife, so, at least I would hope, its not a tranny/driveline issue for me.
