I've got the same exact problem on my 2001 with the same exact symptoms. We even had the wheels and tires checked on a Hunter DSP 9700 and they are true, in balance and with rolling pressures well within spec. The dealer is still working on the problem but has so far been unsuccesful.
It is definitely not a tire balance problem because it is much too high in frequency, does not cause the steering wheel shimmy that a wheel balance problem usually does, and is constant in severity with time (a wheel balance problem will often be cyclic in severity with time as the wheels slowly roll in and out of sync with each other).
I'd love to get to the bottom of it too as it does spoil an otherwise smooth ride over approximately 73 mph.
Tom
It is definitely not a tire balance problem because it is much too high in frequency, does not cause the steering wheel shimmy that a wheel balance problem usually does, and is constant in severity with time (a wheel balance problem will often be cyclic in severity with time as the wheels slowly roll in and out of sync with each other).
I'd love to get to the bottom of it too as it does spoil an otherwise smooth ride over approximately 73 mph.
Tom
Steve said:We have a vibration that is felt in the steering wheel (discovered at 400 miles) that I describe as a high frequency vibration - i.e. too fast to be a wheel out of balance. It starts at 73 MPH and does not go away. It is really annoying as the car is smooth as silk up to that point. Car went back to the dealer last week at 1500 miles. They rebalanced the wheels and claimed it "fixed", but it is still there. I'm calling them in the morning . . . I think it is something other then a wheel. I took delivery of the car on 12/3/01, sounds like it was built around the same time as yours.