If there is a vibration or noise at highway speed, it could be from the frontdrive shaft and may require replacement of the double cardan joint. A double cardan joint is a type of driveshaft joint that uses two universal joints.Google+
Car Problem Reports
Ford F-150 Vibration or Noise at Highway Speed
Ford F-150 Problem
Drive Trains Affected: 2WD, 4WD, Automatic Transmission
Average Mileage: 137,507 mi (20,050 mi - 189,000 mi)
severe vibration after taking it out of 4 wheel drive possibly from driveshaft
Visitor, 1994 Ford F-150, 2WD, 150,000 mi
truck vibrates at 50 miles or above,
I&P and abs light constantly comes on.
rust continues to grow underneath truck.
I had two accident, hit from back and front and air bag never opened.
my truck is doing the same thing there is a ring between both drive shafts that needs to be replaced looking for a name for this product