Flapping/rattle back of cabin 2019 Ram

[Jake F.]

Hey all, I recently bought a 2019 RAM sport crew cab with the 6 1/3 bed. I have acquired a pretty bad rattle when I get up to 50mph and faster, and it tapers away when I slow down. It sounds like it’s coming from under or behind the back seat. Take a listen to the video and let me know your thoughts please! I also noticed it mainly after I put my bed topper on, but that doesn’t make sense to me.

 

[Buz]

Could be the two air vents on the back cabin wall. Maybe your topper is disrupting the airflow between bed and cabin.

 

[Jake F.]

I had that thought too, do you think new air dams would solve that issue or would it be fitting some weather stripping around the box?