Take this as me just passing information along because I have no first hand experience.I have a friend that has a rearend/manualtrans shop and thats all he does,when I asked him about those units he laughed and showed me a box that had several of them broken and in pieces.He showed me one out of a toyota 4x4 with stock drivetrain and 30x10.50x15 tires and it was destroyed,they (powertrax) waranted only one customers out of several and his broke a second time.Again I havent used one but this is straight from him.
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blkcrow
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