No, you do not as the computer does it, provided you install the correct one.
check for a faulty speed buffer module
You would fix it by replacing the instrument cluster. The speedometer itself may not be faulty, it is more likely to be a problem with the speed sensor.
check the fuse panel
you replaced speedo, so try replacing speed sensor
Speed sensor
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.
The speed sensor is located in the speedometer assembly, at the back of where the speedometer needle connects.
The vehicle speed sensor which is an integral part of the speedometer
controls speedometer
the speed sensor, trans. sensor , or the speedometer cable
It has a Speed sensor.
The transmission computer takes the output speed sensor signal and sends it to the cluster for the speedometer reading. The output speed sensor is a likely cause.The transmission computer takes the output speed sensor signal and sends it to the cluster for the speedometer reading. The output speed sensor is a likely cause.