Looks like my first thread got deleted through the system error so I will repost. I appreciate the replies I got back for the first one but I figure this needs to be reposted. Can anybody give reasons of why to choose between the Auburn Pro and the Posi? I am looking at one of these two differentials for my 2000 Mustang GT. I have heard the Posi is good because it is rebuildable and reliable, but I have heard the Auburn Pro will handle more power. How is the reliability for the Auburn Pro? Which internal design is better... Clutch packs or Cones?????