Originally Posted by familycamper5
At this point the Ford dealer says they can't do anything further because there is undercoating on part of the driveshaft which could cause vibration.
Sounds like the "Blame Game" to me. Lots of things cause vibration at specific speeds. Spend 2 years tracking down on in our Buick. I had warranty work done on the driver's door and shortly after (to me anyway) we had a vibration develop.
After MANY trips to try and get it fixed. the dealership basically said "these things happen" and we will need to start charging for troubleshooting.
I found the cause was a loose wind baffle in the left fender (visible right at the hinge. Most likely was disturbed (maybe pushed on) during the original work on the driver's door.
Is your vibration felt in the steering wheel?
Maybe you can locate the area where the road vibration is coming from.
The drive shaft angle seems like a stretch to me...
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