Well I agree on both of your stealership comments... And both of you just confirmed my thoughts on the posi. I've never had any rear drive vehicle lock up before so its just the oddest thing. I figure there might have been some secret someone knows about to keep that rear diff free I.e. maintenance, switch out the existing fluid and use a different brand of fluid, keep my foot out of the throttle lol etc.. Some simple solutions I guess is what I was after. Thanks for the comments thus far