How do you fix a speedometer on a 87 Nissan truck?

To fix the speedometer on a 1987 Nissan truck, first check the speedometer cable for any signs of damage or disconnection. If the cable is intact, inspect the speedometer gear within the transmission for wear or breakage. You may need to replace the cable or the speedometer gear, depending on the issue. Finally, reconnect everything and test the speedometer to ensure it’s functioning correctly.