Quote:
Originally Posted by Bobalong
Without a doubt you have given this a lot of thought and $$. Hopefully someone here will help. Bet it doesn't vibrate in neutral at the given RPM, that's too easy. If the mirror / steering wheel are shaking but not so much in your butt it's an indication of front wheel- tire- rotor balance. Can you find an old school tire balance machine that uses spinner and strobe light. The wheel-tire stays on, and is spun on the car ? You can individually check each wheel.
Put it on a dyno ? Where you can tour around the car as it revs the desired RPM.
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I haven't seen one of those style balancers in decades, I used to work at a Goodyear dealer and we had one in the 80's. I've had the tires balanced, and I've put different wheels on the car, same problem. I've replaced the rotors and wheel bearings. I don't feel it in the steering wheel, it's in the chassis. The dyno is a good idea, there's a place not to far from me that does that, I think I will check into that, Thanks