could be the speedo cable?
check the fuse panel
IF the speedometer is not working it is because the computer is note getting a signal from the trans. and will not tell it to shift. Try replacing the speedometer the sensor in the tail shaft of the trans.
If an input output sensor has gone out, it will affect the functionality of your speedometer. If only the input sensor is affected, the speedometer will work with limited functionality. The output sensor will cease the speedometer from working completely.
There is no speedometer cable. MPH is calibrated using a speed sensor. If your speedometer is not working, you have a bad speed sensor module.
You may need to replace the speedometer fuse. The speedometer cable can cause your speedometer to stop working. The speed sensor can also cause the speedometer to stop working.
No, you do not as the computer does it, provided you install the correct one.
If the speedometer and odometer are not working it may be a faulty VSS (Vehicle Speed Sensor) located on the tail end of the transmission. If only the speedometer is not working it is probably in the cluster and would require replacing the cluster as one unit with a new, rebuilt or used cluster.
If the speedometer in your Voyager is not working, you might have a problem with a disconnected cable or with the fuse to the display. You could also have an issue with a sensor.
If the speedometer is not working but the odometer is, I would suspect the dash cluster is at fault. If both speedometer and odometer are not working I would suspect the speed sensor on the transmission is at fault.
If the speedometer and the odometer are not working, I would suspect the VSS (vehicle speed sensor). If only the speedometer is not working I would suspect the instrument cluster has problems.
The odometer runs on the same electronic gear driven sensor as the speedometer so if the speedometer is working and the odometer is not the problem is in the "Speed head" (speedometer unit in the dash). Mine and several others I have seen break at about 40,000 and will need replacing.
Either that, or the speedometer cable went bad.