While driving the vehicle (since 02/02/19), there is a constant vibration that feels like i'm driving on rumble strips over newly paved roads. when on patched roads, the vehicle shakes so violently, that it feels like the vehicle is going to fall apart. no pics to show or sound from the vehicle. there have been multiple trips the dealership, who initially reported it was a problem with flat spots in the tires, however, after they we changed (with tires from another vehicle on the lot) the problem continued. the next reason was 'that the vibration was intrinsic to the vehicle.' the dealer has 'rebalanced the tires multiple times' which only changes the speed at which the vibration is felt the greatest. the range of speed is 25-50, is less intense from 50-60, and resumes intensity from 60+.