Tom; I assume that your tach and synchronizer don't work. Movement to the left of the large nut may or may not indicate something broken. I would be inclined to disconnect the wires, remove the whole assembly from the engine block and remove the sensors. Turning the center of the gold drive will tell you what moves and what doesn't move upstream of there. Dismantling will hopefully determine what's broken. Good luck.
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Mike
If all else fails, read the instructions
If it ain't broke, don't fix it
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