Speedometer problems

Thanks TrailBeast. That makes sense. I sure hope that's not the case as I've just had everything taken apart, re-chromed,dash painted, steering wheel off, etc. Now it's all back together as of yesterday and encountered the speedo issue when taking the car out for a much needed drive. I'm going to try and disconnect the cable at the speedometer from underneath-behind the dash and take a look at the end of the cable to see what it looks like. Will also powder graphite it real well...Thanks for the info!