I have a 2012 Crew and I hear the clunking noise when I put the car in drive and slowly drive off, usually the first time of the day or when the car has been sitting for a while. I also park in the underground garage of our condo so it's easier to hear the noise then. I took it to the dealer and they couldn't recreate the noise. The dealer suggested I take the mechanic for a test drive to see If I could duplicate the noise while the mechanic was in the car with me. I haven't had time yet to do so.
On a side note, I do often notice what seems to be some kind of "shaking" in the gear down when slowing down quickly. kind of like ABS but from the transmission.
Anyway,
I still love my Journey