Well, I gotta get a diff for my dana 30 front axle because of the ratio change. I've been thinkin'(ouch, painfull) I might as well spend the extra money now and just get a limited slip. I'm kinda leaning towards a Powr Lok(Power Lock, Power Loc, whatever...) because it is rebuildable. The Detroit Truetrac looks good too but is it rebuildable? I'm always looking down the road at stuff like this. I dont want something that I will just have to throw out in 5 to 10 years and get another(like an Auburn unit).