Need some advice with my speedometer cable. My speedometer gauge stop registering at all a few weeks back. My gauges were rebuilt about 15 years ago were working fine (and the cable was new back then also). Should I assume the cable is bad and start with replacing that for this issue? I have a '53 3100, with a '57 235 engine and a 4 speed Saginaw trans. Thanks for any input/advice!