I purchased a Ford Five Hundred 2007, and since then I have had problems with the ride. Constant vibration (like a small jackhammer) starting around speed 43 mph on up to 60 mph. Replaced two tires by dealer, replaced torque converter and have had tires balance 4 times since then. Purchased 4 new tires and would hope that would solve the problem. Even after balancing tires with "Road Force Balance" I still get vibration from the car. Now this is what bothers be, I have drove two loaners from the dealer and they were Ford Five Hundred... read full review »