I have about 100 miles on the new setup. Best news is that the Pinion angle change has eliminated the high freq vibration yahoo! It's only been tested up to 90 so far. I now have a tire balance issue as I can go faster since the drive line vibes are gone. I could not really go above 70 before and vibes started at 60. Today I had it up to 90 but I think I lost some weights off the wheels as I have a lower freq vibe now. Will test wheels for vibe while off the ground to see if its front or back or both. The worst news is that the drive line whine is still there although not as loud. From 50 and up - it fades at higher speeds 80+ and is loudest during slight cruise/acceleration. I am going to ignore it for now as much as I can and hope it fades. if it never goes away - I will put in a new ring/pinion set next year. I will stick with the 4.10's, Love them. 1600 rpm @ 70 in 6th.