2910 Driveline Vibration

I know this has been on the forums before, but here is a recent version.  Like everyone, bad vibration at highway speeds - sounds like angry bees. 

Took it to a Ford dealer that has a large truck center, they installed the Ford TSB which is some kind of balancer in one of the drive shafts.  It didn't work.  They tried everything they could with the drive shafts installed at the chassis shop and gave up.  They brought in a drive line specialist and he replaced the 2 non-Ford driveshafts, balanced and phased all three, and set shaft and differential angles.  The result is smooth as silk.  The photos are before and after.  Clearly whoever is doing this work at the chassis shop has no clue.  If i did it right, before and after pics are attached. 

If your unit is under warranty, don't wait - get it fixed.  This was a $1700 repair.

Hi Will,

In your first picture, it sure looks perfectly straight after work was done.
In your second picture it, sure looks crooked before the work was done.

I would first email your findings with pictures and your bill, then follow up with a phone call.  Phoenix will refund your expenses under their warranty.  I believe they will forward the bill to the frame stretching company that did the work in the first place.  Come to think of it now, maybe you did send the bill to Phoenix and your last comment is for those who didn't.  Whatever the case, thanks for sharing.  The drive line vibration issue has come up before with lengthy discussions and resolutions.  Your thread is extremely useful for people who don't know what is going on nor what to do about it.

Thanks for the input.  We purchased our PC used so I figured PC doesn't really want to hear from me.  I have a good friend at the shop who did the repairs, he is fighting with Ford to get them to pay for it (they keep refusing).  If that fails, perhaps i will give PC a call.