i've had the same. its an elimation process. tranny mounts to start, they are cheap and easy to do, flex disc is certainly there id bet my left ball you have one! most likely the centre bearing let go. but its not to expensive excersise to do the engine mounts, tranny mounts, flex disc and the centre bearing. a weekend, a few boxes of beer, decent tools and your are done. there should be aheap of info in the search. PM if you need help as i have done all of this myself before and I am not a mechanic.