If you take the speedo out and take the back off you will see the pin with the mileage numbers on, on the end of this shaft there is a small gear, that small gear sometimes splits and then just spins on the shaft.
its a fiddly job but you can knock the shaft out clean any grease of the gear and superglue it back on
its a right pain lineing everything back up to reassemble but very doable
A forum community dedicated to aircooled Volkswagen owners and enthusiasts. Come join the discussion about performance, restorations, modifications, classifieds, troubleshooting, maintenance, and more!