I recently installed a new one-piece speedometer cable in my totally original 08/1968. Good news - the speedometer and odometer worked immediately after installing. The speed needle was not steady (it oscillated within about a 3-5 mph range at all speeds) and the odometer was accurate to within a 100 feet per mile based on using roadside mile markers. After about driving 45 miles, the speedometer needle became steady and accurate, but the odometer stopped working. When I installed the new cable, I made sure that the cable head was pushed fully into the speedometer, but I was not sure how much packing/washers to put onto the cable where it screws into the transfer case. I only put the oil seal rubber washer/grommet that came with the new cable onto the cable before screwing it into place. Do you think I need to add another rubber grommet or metal washer to keep the cable from shifting within the cable housing? Or, is there something else that I need to do to make the odometer start working again? I know the odometer is not the problem; it rotates when turning the cable with my fingers. Any and all advice is appreciated!