I was rolling down a paved road, and suddenly my speedometer stopped working, said I was going 0 miles an hour, and the odometer was also not advancing. The clock is working, leading me to believe that it's somewhere in the cable. I pulled over and unscrewed the cable from the speedometer unit, there was a lot of grease on it, but it was fully plugged in on both ends. Any idea where I should look for issues? Just looking for somewhere to start, thanks for any advice!