On my '56 Fairlane I just did my oil change and noticed after a decent 2 mile drive couple weeks ago where I found a horrible spark knock and transmission falling out of gear, I realized my odometer is still sitting at 55,000.5 but I have photos from before the car was driven that is reading 55,000.6

Im curious what could cause this?  I don't know about the '56 gauge but I know newer speedometer gauges uses a worm gear to spin the odometer while the needle moves through magnetic interference as the cable spins the assembly which spins the odometer worm gear.

Im wondering if this is something that could be simple to fix or if it would require sending the whole unit out.  if I send it out then I would probably pay for a full restoration to make it like new.


1956 Ford Fairlane Town Sedan - 292 Y8 - Ford-O-Matic - 155,000 mi