I just got mine back from the dealer this past monday. I told him about the same thing (clunk sound when tranny shifts). They told me that they checked it all out, but that the sound was okay, due to the wheelbase of the vehicle... I agree with you though, it sounds JUST like a u-joint before it breaks! Oh well, its under warranty. I just hope it doesn't break when I am in the middle of nowhere (or even on the edge)!!