My 87 pickup speedometer once i hit like 40-50mph starts BUZZZZING and shaking and jumps to like 90, any one know how to fix this? or get back there? thanks!
If it uses a cable, might just replace it. The internal rotating shaft should pull out of the sleeve from one direction or the other. You might read up (Google search) on what lube to use, grease or a dry lube. Make sure you reinstall the shaft in the same direction it came out.