How do I know which speedometer gear to use?
What gears should I get?
- Count the teeth on the speedometer drive gear.
- Find the gear ratio for the drive axle.
- Calculate tire revolutions per mile.
- Calculate the required tooth count for the driven gear.
- Get the Driven Gear (for your transmission) with the closest tooth count to your calculations.
Where is the speedometer gear located?
The speedometer cable gear (driven gear) is mounted within a sleeve/housing that goes into the side of the transmission’s tailshaft housing. This is where the speedometer cable attaches to the transmission.
How do I speed up my speedometer?
Changing the ratio between the drive gear and the driven gear will change the speedometer reading. A driven gear with fewer teeth will speed up the speedometer reading; more teeth will slow down the reading.
Can Ford dealer calibrate speedometer?
If you have a dealer that is telling you that the speedometer can’t be recalibrated, find a new dealer. Ford’s design teams have been making the wheel wells/arches increasingly larger with each new generation to keep in line with the trend of ever larger tires and wheels.
How do you calibrate a speedometer after changing gears?
Press and hold the calibration button located on the speedometer, start the vehicle, and then release the button. Press that button again and then take the test drive. Once you have driven the distance needed, press the button once more and the speedometer will calibrate itself to accommodate the new tire size.
Can you adjust your speedometer for bigger tires?
You might ask: do bigger tires make your speedometer faster? The answer is no. Tire size and speedometer accuracy are directly linked to each other. Up-sizing, or installing a taller tire, will lead to a speedometer reading that is slower than your actual speed.
Will changing tire size affect my speedometer?
Problems With Tire and Wheel Size Changes One of the most common problems a change in your tire and wheel size can cause is an inaccurate speedometer. A larger tire has a higher circumference and fewer rotations as you roll along the highway. Because the tires rotate slower, the speedometer reads this as a lower speed.
How do you adjust the speedometer after bigger tires?