Passat downshift bump

Hi! I have a used passat and when it downshifts is sounds like a motor mount could be broken, but I checked the motor mount and it is good. Could this be a transmissons problem. Can anyone give me some advice.
Thanks Lou Passat.

what year, engine?

04 passat v6 has transmission module update for 2nd to 1st clunk when downshifting.



other than that its normal to feel a clunk like noise on v6's. its kind of like a hollow clunk when downshifting, it makes that noise on all v6 passats i dont know why and neither does vw.

Check if your control arms are good, mine make clunk whenever I rapidly accelerated and quickly removed foot from gas pedal. Originally, I thought it was motor mount. Just raise the front end up and manually move tire and the two upper control arms are right in front of you.