At 80 miles an hour I start to wonder about the wind Dynamics and aerodynamics? Possibly something sticking out on one side further than the other or some kind of tail draft...
Understand I'm totally spitballing...
It could even be a shock, but it definitely feels like a wheel or tire hopping.
Waiting for a call back from one of our local Mopar group to see if we can do this on his concrete instead of my stupid gravel.
If not, I'll do it on gravel.
