- 11mm socket or wrench
- Small Flat Tip Screwdriver
Carefully raise and support the vehicle.
The speedometer gear is located, on the driver’s side of the Mustang's transmission tailshaft.
Use an 11mm socket or wrench to remove the securing tab to the VSS sensor and speedo gear.
Pry and remove the retaining clip from the gear.
Install the correct speedometer gear and retaining clip.
Lubricate "O" ring seal and reinstall VSS sensor and gear in reverse order.