I had a local member of a Racing board I frequent install a set of 3.73 gears in my Saleen on Friday and he did an outstanding job. Only issue was my stubborn pinion gear that did not want to come out of the housing!!! He did it fairly quickly. Had the pinion gear not given him as much trouble as it did, it would have taken him about 1 to 1-1/2 hours. No whine from my gears and I really notice the difference in 2nd and 3rd gear. I replaced the stock 3.27's. I think 4.10's with my supercharger would have been too much. Here's a couple pics as he was getting started...