2003 Passat 1.8T auto trans, 160K miles. After very heavy acceleration up to 50, 60 MPH or whatever, speed doesn't seem to matter but it must be heavy on the gas then let off gas and I will get one very large clunk from font end. First time it happened I thought oh man I just ran sometime over, but look in the mirror and road is clear. Now that it has happened a few times I know I didn't hit anything but each time I have noticed it was right after acceleration never during acceleration. I suppose you might say this has been answered but I have searched and have seen plenty of clunk discussions but I haven't seen anyone posting an issue quite like this as others seem to say it happens on both accel and decel. Mine is only decel and only right after heavy accel and it will be one very large clunk and then everything is normal after that.