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Originally Posted by benchtest
Curtis, Hard to beat a standard clutch-type posi. They're quiet, smooth, predictable, repairable and reliable. I've beat on my posi for over 100K and except for breaking the case in half on the factory model (7.5" Ford - replaced with Motorsport version), it's never let me down...street or strip. Just my 2 cents.
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Good advice. I like that they are rebuildable, but the ones I've had have been a bit of a pain. It seems like you are always at a huge trade off; either you get good even traction and put up with the turning problems (like an Eaton with 800-lb springs) or get smooth turning with pathetic torque bias (like the same with 400-lb springs).
What about something like a gov-lock? I have one in my 14-bolt truck axle, but I've never had that car running long enough to know if I like it. I've heard people speak badly of it, but is there something like it for an 8.5? In case some of you don't know, (and I'm terrible at this since I know very little about them) its the one they use in trucks that has spider gears and clutches and acts as an open diff until spin is detected, then it locks up the clutches.
I also just recently read that its possible to replace the springs in Eaton units with shims to get better free-wheeling when driving normally, and more positive lockup when thrashing. Ever hear of it?