Why does my speedometer make a high pitched noise?
A high-pitched sound is generated by the metal core rubbing inside of the cable sheath. A speedometer head can also generate noise, which also spins along at the same speed. If you disconnect the cable from a speedometer head and it still makes noise, then you have just isolated the problem as the cable itself.
Are there any problems with the speedometer on a vintage car?
Fortunately, problems with mechanically operated speedometers can often be resolved with a little effort. Here we’ll talk about how they work and common problems on vintage automobiles.
Where does the signal come from on a speedometer?
A signal originates from a driven gear that meshes with the transmission tail shaft. This set up rotates a flexible metal core inside of a speedometer cable, which in turn, connects to the back of the speedometer head mounted in the instrument cluster . The faster the tail shaft spins the higher the reading on the dashboard.
Is there a way to replace the speedometer cable?
Replacing the speedometer cable is one option, but there are two methods for lubricating the old cable that’s worth it to try first. For one method, they make a special speedometer cable lubricant that’s installed where the cable attaches to the speedometer head.
What does it mean when your speedometer cable is failing?
Squealing noises coming from the dashboard or below the car. When a speedometer cable and housing are failing, they may make squealing noises. The noise is also associated with the speedometer needle jumping around erratically as we explained above.
Why does the needle on my speedometer jump?
While you are driving, if you notice the needle on the speedometer jumps erratically from one number to another, the speedometer cable is most likely damaged or the sensors on the driveshaft are not accurately sending the signal through the cable.
How does the housing of a speedometer work?
The cable housing is a protective sheath that surrounds the cable to prevent it from being damaged. These two components work in conjunction to power the speedometer and deliver an accurate reading. Over time, they can fail due to damage, or wear and tear.