I'm getting a periodic thumping from what sounds like the window inside the door or some part of the latching, etc. when I'm going slow over a bump or something and really can't place it. Don't notice when top is down (duh). It sounds like something settles in because I don't hear it much after the first thing in the morning (really). Anybody else noticing anything like this?

 

is it like a cracking / poping sound? if it is, then there is a tsb for it. I just had mine done, and it's due to lack of grease on the window track.