The odometer and tripometer don't work on my 67. I am looking at the odometer repair gear set sold by one of the corvette parts vendors / I have a friend that lent me a instrument cluster with a speedometer in it that I could do research on / upon disassembly of the separate units in the speedometer mechanism I found the shaft / that goes from the rotating disc that operates the speedo needle to the gear that drives the odometer / does turn but the end that has a worm gear does not engage the odometer drive gear. I am looking for any guidance as to weather this gear set will fix my problem or are my observations of the problem just the tip of the iceberg in dealing with this problem. Thanks in advance for all and any constructive ideas. Jeff