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that is something to look for. on other trucks it is a loose pinch bolt on the arm that allows the arm to move slightly on the shaft. from what i have seen it is the pitman arm that gets the damage to the spline so i am useing new arms. used boxes go from $200 to $300. if it says METRIC it will not work. the part # is cast on the back, 7830389 if you want rebuilt, most suppliers will charge you for the rebuilt box and a core charge, expect $575 total in this case.
tom
tom
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