Starting to chalk a lot of it up as just a noisy trans.
It happens from 1-2 a lot, sometimes 2-3, and when I put it back in 1 at a stop it sometimes does it too. Just a semi-loud clunk, can't tell if louder with the windows down or not, though people on sidewalks seem to be able to hear it clearly (they whirl around to look).
I can't feel anything when it happens, so unless it gets any worse I'm chalking it up to a talkative trans as well. Need to check out my shifter cables when it stops raining ice..