My hoses were relatively new because I have an aftermarket trans cooler added for towing. The clunk sound has returned when the trans downshifts from 2nd to 1st as I come to a stop but I have NO leaks. I don't know if I need to somehow force more trans fluid into the system or just live with it. Since I have the trans cooler and longer lines, I may need more fluid than stock. My front wheel drive is not connected which could be causing the clunk. I've read on the forum that the clunk is pretty widespread and may be normal for our vehicle. I've thought about jacking up rear of vehicle and then adding fluid so that maybe there will be more room in the pan. Please comment if you have the clunk issue and have any advice.