I am the owner of now 4 Honda's and this the first time I have a problem of this nature. My car only has 56,000 kilometers on it. I do mostly urban commutes so I don't often drive over 120km/hr, but even at 120, you can feel the vibration and makes the car feel like an old piece of Junk.

Vibration feels like either half shafts or too much play in the transmission. This occurs in that vibration area of 69 to 72 MPH as in most all vehicles. I had a wheel bearing failure at about 9,000 miles on Left Front, but do not get a chance to get out on Freeway for top speeds very often.

The speed of vibration tells you it is in Driveline and Not Tires.