Hello everyone. I have a problem with vibration that has been developing over the last few months. It becomes apparent at about 50mph and increases progressively from there. At first I thought the rear wheels needed balancing so I had them done twice to be sure. No improvement. I then replaced the tyres with a different make ( off with the Dunlops and on with Michelin ) with no improvement. It is getting worse and feels like a faster vibration than a wheel balance issue to be honest. It doesn't make any difference whether the car is under acceleration, neutral or coasting. The vibration stays the same. Any ideas?