Twisted/Bent driveshaft...see video

[Chuck Leeper]

In talking w/ the shop I get my d/s work done at, he told me that 90% of the F body vibration issues he gets involved in, turns out to be a bent shaft. Most have had tire shake, wheel hop, slicks, burnouts, etc, run thru them. They bend at the center due to being pretty much like the GN/TR shafts...Not designed to be used as they are. Exceeding the critical speed of the shaft causes a whipping action, as the center is the weakest point.

Glad you found it!

 

[stickybones]

Makes me wonder if mine is tweaked. I have the same tire wobble as the OP. I also have my original 26yr old/140k mile DS on my car. I've had my wheels road force balanced and I've changed the U-joints but the problem persists. Trans mount is tight. Might be worth while for me to look into the DS a bit closer.