Ken,
Thank you so much. I just realized what my problem is. I have too much pinion angle. There shouldn't be more than .5 degree difference between front and rear pinion angles on the same driveshaft.
I thought I didn't have enough. After stopping at the local Hummer dealership today and looking now at your pics, I see that I have too much. Isn't that wierd? I wonder why mine would have any more than anyone else's?
Nonetheless, I had the driveshaft shop make up ANOTHER driveshaft except as Beastmaster even suggested, I had them make it up with a CV joint style driveshaft.
Thanks for the pics, much appreciated.
Mark