my 19 has a noise that my 18 didn’t. At low speed over washboard type bumps I hear what sounds like something loose , like the spare tire, it’s not. Sorry for the lame attempt but it sounds like “ dunk, dunk,dunk”. Sounds much like tire slap over cracks. I just drove another 19 and it seems to do the same so I’m guessing shock valving? I’d love to fix this if possible.... it sounds like wind buffeting when you have only one window open , not as loud.