Had same problem, RF sway bar bushing was toast. Not surprising with 133k on the chassis and likely the original known-to-clunk bushings. RF was visibly mushroomed and nearly cracked in half when I replaced them both today.
BTW I could re-position the endlink and "change" the clunk like the OP mentioned.
Put OEM bushes in, $7ea, and noticed they are the uprated models with the slit/split located at the 400 o'clock position instead of 600. Link here for good pics: http://perrya.hubpages.com/hub/How-t...Tribeca-B9-SUV
What a difference, OB stays much flatter in turns now. And of course no clunky LOL.