Ah, okay. Good to know. Thank you.Thanks.
The rubber isolators are stock. The carrier has enough adjustment to get the tire snug against the tailgate. It's not so much that the tire is bouncing around at the mounting point. It is a very snug fit. It's the lack of strength in the stock hinges that allows for sag and movement of the entire assembly. It's fine for driving around town, but I'm not confident wheeling with it like that.
It would be nice if someone made the Exogate for the JL. I use it on my LJ to carry a 35" tire on the stock tailgate and it works great!
I guess we all get to wait for someone to come out with hinge replacements.