Will a factory limited slip rear end just wear out and stop working eventually, or will it start acting funny when it wears out. The options list for my Blazer says a I have a limited slip rear end but when I got stuck in the snow today only one rear wheel appeared to spin. Would I be able to tell if it was worn out just by looking at it? When I had my transmission rebuilt I also had them change the gear oil and no one said anything about the rear diff needing fixing. I've never taken the diff cover off myself so I'm not 100% sure it's got a posi rear end but I don't see why it would say so on the options list under the hood if it didn't. My truck has 197000 miles on it so it would make sense to me if it was worn out.