Hi, all. Doing some odds and ends waiting for a fuel pump actually. My odometer stopped working so I've disassembled to go through the cleaning and re-lubricating process mentioned in other threads here. It appears the main worm gear is stripped out. I'm unable to find the part online so I'm guessing I need the entire unit. I've looked in classifieds with no luck yet. I'm working on a 1970 series 40. Does anyone know what range of years cluster will work to replace? I know it has to be pre '72 because of the speedo screw on vs clip on. Does anyone have one or have any leads?