I am about to upgrade my rear with a 31 spline hardened axle set up and I need to select a positrac kit. I am running an auburn kit now and I have no complaints so far. A lot of people at the track don't recommend the auburn kits because they easily fracture under repeated stress. My car is a 1990 Saleen and I mostly use it for shows or street racing on fair weather days. I don't want to put in anything that makes a lot of noise (detroit lockers) because I enjoy driving the car around town. Any information on which positrac kit would best suit my application would be greatly appreciated. Thanks...Lamb