My friend and I were discussing 4x4s...He has owned several T4Rs in this model year group and swears that his front diff was a spool from the factory, not a selectable locker. For example, when his hubs were locked, so was the whole axle. I don't believe that any T4R was locked in the front at all. He swears that on dry pavement the front tires chirped in turns and even spun at the same speed when one was on ice. Could this be simply a stout limited slip? Were any 4Runners set up locked in the front stock??? Where can I find toyota specs that will prove or disprove?? Any help would be appreciated. Thanks.