Volvo: volvo shaking at 35mph, ball joints, inspection time

Question
when my volvo reaches 30 to 35 mph it shakes. had ball joints replaced tires rotated etc...

Answer
Jeff,
Someone needs to drive that car and feel the vibration and see where it comes from. The tires could be out of round, a bent wheel, a driveshaft or driveline related failure, like a u joint, or a center driveshaft bearing, blown out trans or motor mounts front or rear axle bushings. This is a car that will reqiure some inspection time and process of elemination.