Don't know what type (yet!). Just that the guy said it was a new system that required the car to have weights added to simulate pax in the vehicle.
Sounds like you have not seen my earlier posts about my tram lining issue. My Coupe has only covered 20k miles, I want to eliminate possible other causes before buy new tyres. I've changed the sterering stabilizer ( no change), I'm now going to get the steering geometry checked ( toe, camber & caster) just to remove it from the equation. I've read that certain tyres (stiff sidewalks) can make the issue worse and a few people have given me details of tyres that remove or reduce the tendency to tramline.
I would have thought that Chrysler would have determined correct geometry angles with an empty car, so putting simulated load in the car would give different (incorrect?) results.
Mick