so, my 2006 montana sv6 awd 3.5 still clunks. I replaced the lower engine mount and transmission mount. I'm satisfied they were marginal at best, as the transmission mount had half the clearance of the new one, and the engine mount sloshed and the new one doesn't. but. every time I shift the transmission while parked or when I jab the gas pedal while driving, basically whenever the engine and transmission pitch, there is a loud clunk that transfers through the AWD into the rear end of the car. what part would I need to look at and how can I verify it's bad?