Okay, the Vibration starts about 50mph through to 70mph. It shakes the entire car-very little if anything coming through the steering wheel.
Steps taken 1)balanced wheels twice with different machines with no difference
2)swapped all four tires from my other car with no effect
3)replaced driveshaft support and bearing with no difference
4)replaced one rear axle shaft and right rear control arm after it collapsed no change in vibration
5)replaced engine and transmission mounts
6)replaced steering damper
The left front caliper is sticking, and it could use front shocks. The tie rod ends and upper control arms and a ball joint are about a year old and still okay. The vibration is speed related-no change with engine rpm or when shifted into neutral. Smooth as can be until 50mph then, it just goes into a crazy resonance until about 70mph. The amplitude gets lower after 70mph but, it is still there.
WT$@&% should I be looking at?
Any help would be great