So on my daily driver Challenger I've had a strange type of , feels like a wheel/tire tramping right between 65 and 75 mph. It's in the front. Been there since I got the car, not really a big deal but it's kinda been pisssing me off. Back to the Dealer where they do Road Force Balance with a Hunter machine. Get the car back, and the same thing still no difference. Talked to some people at work about it and one guy...who has a 78 Corvette Pace Car...told me to go to a shop in Hollywood that he uses, and let them look at it. Yesterday I take off work, to get to this urban little rinkey dink shop with a bunch of old Muscle Cars sitting outside. Explain what's going on to the guys there. They did the same Road Force balancing , but showed me where they were dis-mounting one of front tires and changing it's position on the rim. Test drove the car and that vibration is gone..gone..gone.. I mean, never been this smooth. Lesson learned as the guy said. Just because they have the right equipment ...it doesn't mean they know OR care enough to use it properly. Or care about you as a customer to even try.