I am looking at an 85 blazer with a 208 t-case. the owner says the t-case is bad. it "slips" out of gear when driving. if he puts in 4 wheel dr. it doesn't happen. only 2 wheel. I haven't had one of these open in a long time and can't remember what the guts look like. does anybody have a breakdown pic or an idea what wrong? I want to figure out cost of repair/ replacement before purchase.