I have a 2013 Ford Explorer 2.0 Eco Boost. The turbo charger had to be replaced. There was a lot of noise and the repair shop said it was the motor mounts and replaced them. The noise did not stop and they then replaced the turbo again. The noise stopped, however there is a vibration when you are driving it. There is a hard vibration or jerking of the car when you are easing along between 35-40 mph. The mechanic cannot figure out what is causing it. Any ideas?