Quote:
Originally Posted by Payton King
on a friends car. He went from a GM 12 bolt to a 9 inch ford. The Gm is hub centric and the ford is lug centric. Meaning the wheel fits on the raised portion of the axle to center the wheel on a GM. On a Ford, the style of lugs center the wheel. What happened was the same wheel and lugs were used when he switched to the 9. The wheel would move and get off center causing a vibration at high speeds....basically wheel run out.
You can either change lug style and make sure the wheels is sitting flush on the axle pad or machine a thin spacer with a hubcentric centering ring.
Does this make sense?
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Makes sense to me. Have been through that one.
sfenco did you spin it up to 80mph both with and without wheels?
And..have you had someone drive along side the car when you are experiencing the vibe to see if the wheels are perfectly stable.
Have seen wheels oscillate vertically from weak shocks.