I recently pulled off my rear diff cover on my 2000 silverado 4WD Z71 5.3 because of a clunking noise that was happening on take off. Local chevy dealer said it was a faulty transmissoin mount and that it was no big deal. I was not convinced so off came the rear diff. When i pulled it off the spider gears had chunks missing and the carrier pin and retaining pin had wear. The ring and pinion looked good. I have checked a couple forums and found other people with exploded rear ends at 40 - 70000 mine has 113000 so i guess im lucky its made it this far but i was wondering if it would be a good idea to put in a powertrax no slip diff or would i be better off with a locker or posi unit. I do not do much offroading it is mostly a daily driverand every thing is stock except 285-75 wheels and tires. any help would be appreciated thanx.