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Thanks for all the suggestions. I had two of the old "two motor" 44 tonners before. This one has the single motor with universal joints to the worm gear towers. I still tend to think that the bind is due to the immovable position of the worm gears in the frame (held by screws to the frame). When the trucks pivot, the geometry between the spur gears and the worm has to change. But one of the replies said yours did not have such a problem. I have disassembled the unit, checked for binds, wobble, and burrs in the gears. I even "swapped out"components with the second unit, now used for parts, all to no avail. Am I off base about my "worm gear binding" theory?
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