[ScottyB]

So I checked the rear cross member mounts and found that the 'rubber stopper' was a little worn. Also the rear differential bushings are shot, but they always kinda were... This drive shaft vibration seems to have pretty much destroyed what was left of them. So I guess I'll replace these parts, but I a couple worn bushings doesn't seem to be enough to warrant such a violent vibration... I guess we'll see.