Rooftop AC Shroud Vibration when Trailering

[DRS3rd]

New to this helpful forum! I just purchased our first pop-up (a used 99, but like new Coleman Niagra) and has roof top AC. When we trailered home I noticed the AC Shroud cover sure did a lot of vibrating up and down (1/4 to 3/4 inch) and became worse when traveling faster with more wind. I checked and the AC unit itself is mounted solid. Also, AC works fine. Checking the shroud cover it seems tightly fitted but does have a little play with effort. Assuming it is mounted on rubber. Is this vibration normal and do I have to be concerend? Is there a way to fix the vibration? I see no way to access from the outside and again assuming (hate to assume) you have to pull the cover from the inside to check. Any suggestions? Thanks.

-Don

[Monterey]

I noticed the AC cover vibrating on my 03 Monterey as well.  I am planning on getting a brace made to prevent this from the people that make Popup Gizmos.  Here is the link for the shroud brace  Shroud brace at Popup Gizmos

[mike4947]

If it's a Coleman unit then yes get one of PUG's braces. A couple of years ago Coleman redesigned the shroud/cover so that the vibration wasn't a problem. No soap, the new design just vibrates slightly less than the old design. The brace "fixes" the problem.

[tlhdoc]

You need to get the Pop Up Gizmo's AC brace.  If you don't you will end up replacing the shroud on the AC unit when it breaks apart.

[DRS3rd]

Thanks to All! I ordered an AC Brace from Gizmo and look forward to same fixing it.

-Don