[justa6]

Thanks for the reply. When I was at Run & Gun last year we "ate" the rear universal. I was very lucky that the driveshaft stayed in place as I felt the vibration during the Road Race time trials. Thanks to some fine people there we got it fixed within a couple of hours. We thought at the time that I had overtorqued the U Bolts as only the caps in the U bolts failed. The other two were perfect.

When we put the driveshaft back up we did not overtighten them for sure. Everything worked fine for about 1000 miles with maybe 20 1/4 mile runs. When I was driving this spring I again noticed a VERY mild vibration on acceleration. I could even see it in my rear view mirror. Kind of like on a motorcycle when the mirrors "buzz".

Took the car home, put it on the lift, and pulled the driveshaft. Removed the bearing caps and again there were some of the needle bearings broken. Removed the universal and looked at the two bearings that are pressed into the drive shaft and they were perfect, again.

Its really hard to figure out why all four bearings don't suffer the same fate...

In closing, as I think I mentioned before, for the first 1000 miles there is no vibration. My rear view mirror is nice and smooth both accelerating and decelerating.

Thanks again,