2. Check the speedometer gear. The speedometer gear is a small plastic gear that is located on the transmission output shaft. If the gear is damaged or worn, it can cause the speedometer to make noise. Inspect the gear for any signs of damage, such as cracks or teeth that are missing. If the gear is damaged, it will need to be replaced.
3. Check the speedometer head. The speedometer head is the assembly that contains the speedometer needle and the odometer. If the head is damaged or loose, it can cause the speedometer to make noise. Inspect the head for any signs of damage, such as cracks or loose screws. If the head is damaged, it will need to be replaced.
4. Check the wiring. The speedometer is powered by a wire that connects the speedometer head to the battery. If the wire is damaged or loose, it can cause the speedometer to make noise. Inspect the wire for any signs of damage, such as breaks or loose connections. If the wire is damaged, it will need to be repaired or replaced.
If you have checked all of these things and the speedometer is still making noise, you may need to take the truck to a mechanic for further diagnosis.
