Thanks for the update Steve, May I ask what prompted a concern about the rear end? I recall seeing the earlier pics of your gear mesh markings. I am use to detecting the noise on the road under float/load, were you able to simulate this elevated on the rack? Or was it the result of loading in gear when the drive train transferred power back? Good detective work on the alternator, the first thought I had was the alternator light in the dash cluster, understand when they go, no charge...Casper has a fix for that I believe.