Quote:
Originally Posted by ahausheer
A wheel thats out of balance will do something similar what you are describing with the harmonic at multiples of a set speed. Usually you feel the tire bouncing but perhaps the suspension is soaking it up. Only the wheels, tires, and bearings, are speed dependent, everything else is rpm dependent. The differential rpm dependent.
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Interesting point, and one that would make sense given what I'm hearing. I don't feel a balance issue, but that could still be the cause. She's going in for her complimentary first oil change soon, and I'll mention this to the service folks and may have them do a tire rotation to see if the sound changes location to my ear.