Needle appears to indicate proper speed but the odometer will not turn...Cable is connected properly and clicking sound is heard.  suggestions on who repairs the 78's and how is it disconnected in the rear of the meter???before I pull it out? thanks

   A clicking sound could be that the internals of the speedo are defective. There is a set of gears that drive the speedo and the odometer of the cable connection and one of those could be bad or worn, hence the clicking. It's not a real hard job to remove the ccluster from the dash, but take it real slow and don't force anything. I would look in some of the Vette mags for a service that will repair speedos. Usaully in the ad sections of these mags there are a number of companies that will repair or replace your speedo and odo. Hope this will help you out.

Jim

One thing you might check if you have it is, the odometer cable to reset the the numbers to zero. when I use mine after turning the knob I have to pull down on it or move it up and down to get the numbers to start moving again after being reset.

I got the speedometer out ok and sent it to Corvette specialist of Maryland.  Sent it out on Saturday and had it back by Wednesday.  gears needed lubed and cleaned and works fine now well will know when I get it back in the dash???? Thanks for all the suggestions, onto the next project...