My 1995 Has a LSD from the factory, seems to work fine in the mud, snow and ice. I've also got a 2007 Chevy 2500HD Diesel pickup from the factory it has a detroit locker, my wife hates it, it makes a noticeble "clunk" when going around coreners in wet weather (doesnt help that I have a lead foot, LOL). I dont mind it at all, they work great (Detroit Lockers) and dont have to be managed from the drivers seat. Considering one for my pathy when I get around to the SAS, whenever that may be.