I have recently purchased the vehicle and since i have purchased it i have done the following: 4-wheel alignment, tire rotation and balancing, new brake rotors and pads and new CV joints (installed first in that list by previous owner just before i purchased). Yet after all that, i still feel the car shake between 55mph and 75mph in the steering wheel, floor board and seat cushion. I have ruled out the CV joints, tires and brakes so could the ball joints have anything to do with my issue, or is it something else? It is a STD 3-Door Hatch with over 200k on the ODO.