Hi Guys, My rear end is out of my 57, sitting on 2 cinder block where I've started to scrape the 1/4" grime off it. Anyway, I started spinning by hand the part of the rear end that the universal joint is usually connected to and noticed that both drums turned at the same time. Actually, both would turn together, then the passenger side would hesitate a little and then continue to turn in unison with the driver side. Is this how the normal 57 rear end works, or is this a posi rear end? I know the axils have been changed because 2 axils and a 57 powerglide transmission came along extra with the car. Thanks for schooling me.