Contour Enthusiasts Group Archives Forums Modifications Suspension vibration rear control arm related??

Drive axles. Mine did the same thing, almost two years I suffered with it paying for rebalancing, etc. It just kept getting worse. It got to the point that under cruise it was ok but any slight acceleration would result in a shimmy throughout the car even though the steering wheel didn't wobble.
The dang passenger seat would shake when I'd accelerate. Any speeds above about 40-45 mph would vibrate and progressively get worse as I went faster.
In the early days it was just at speeds of around 70+ but as time went on the speed that it would start to vibrate would get worse. OF course, always under cruise the vibration lessened.
Hope this helps.