[Da Man]

I know you think it's a front end shake, but have you considered the drive shaft?

While they are really small on these cars, a friend of mine with a 2011 Mustang recently went through a long and frustrating process trying to find a vibration that was at a very specific speed (60-75 mph). He had the wheels and tires balanced off the car, on the car, had the tires and wheels checked for out-of-round, even replaced the front rotors. The dealership, while acknowledging the problem, threw in the towel and was unable to explain it. They had even gone as far as to replace the outer tie rods and, finally, the steering rack.

Finally, he was told by some sage older fellow at a car show to change out his drive shaft for a 1 piece aluminum unit. Presto! Vibration gone. The cheap Ford boat anchor that was installed at the factory was found to be hopelessly out of balance and causing the vibration at one specific speed range.