Hello out there. My car vibrates at certain speeds,especially around 45 and 60 mph. I've had 2. sets of wheels and tires so it's not that. Sometimes the car rides smooth with no shake and as soon as I'm happy, BAM it starts all over again! Been to dealer and other shops paying lots of money having various things done but problem continues. I'm thinking it may be such a minor problem that it's being overlooked. HELP!