Originally posted by LandShark
Vibe is finally gone, only have a slight vib above 95, but can even still use the rearview up above 110. It was a struggle, but the best path is to ask for a Ford engineer to look at the car. Actually, the dealership I took the car to in MI, Harold Zeigler in Plainwell, was very nice and worked with me to get the proper attention from Ford. They even drove the car above 80 mph to verify my description of the intensity of the vibration (something that is not approved by Ford and my local dealer in TN would not do).
In the end, I learned that there is a new driveshaft being designed which will fix the vib problem. Not sure of the availability, but I think it should be within the next 3 months. They replaced my DS for a second time and it fixed the problem. The explaination I was given was that the problem is due to the tolerance allowances on the DS and the IRS succeptibility (sp?) to vibration vs a fixed shaft rearend. The new design is supposed to tighten up the tolerances in manufacturing significantly.
Probably said too much here, but wanted to let all know that Ford is working on the problem and believe they have a solution in the works.
LS
It would be great if you could post when the "new" driveshaft becomes available and a part number.
Thanks,
Mike