This is driving me nuts, new to me Lx570, 2013, 64000. There is a vibration at highway speeds between 65 and 75. Vibration is worse when the spare tire is in. It vibrates the whole cabin, you can feel it in the floor, your seat, the door if you put your leg on it. If you put your head back on the seat it vibrates your head. Removed the spare tire and the vibration is still there but not as bad. I thibk the vibration is being emphasized by the spare also. Truck came with new tires mounted and balanced. I did AHC full flush already. I checked front wheels and there is no play any direction. This new truck replaced my wife’s 4Runner and she absolutely hates it. Trying to figure this out and any help or advice would be appreciated