How to change speedometer calibration

A vehicle’s speedometer gives the driver an accurate estimation of the speed it is driving, or at least it should. When buying a car from a dealer, the speedometer is normally adjusted, or calibrated to the vehicle’s stock parts. Certain car parts, if changed, can throw of the speedometers calibration, (such as getting new tires) which can result in a wrong speed reading. Switching to larger tires causes the speedometer to give off a slower speed reading than the vehicle’s actual speed. Similarly, switching to smaller tires causes the speedometer to give a faster reading for the vehicle’s speed. After the tires are changed, or if you bought a salvage car, the speedometer needs to be recalibrated. Here are a few simple steps on how you can change speedometer calibration for a mechanical or electrical speedometer.

If you have a mechanical speedometer you would start by opening the vehicle’s hood and locating the transmission. Next, unscrew the speedometer cable and unscrew the bolt holding the gear housing cover. After removing the plate, you will see two gears. Count the number of teeth the gears have and remember it for later. Next, get the diameter of the tire and divide 20,168 by the tire’s diameter. This is the tire’s revolutions per mile. Multiply this by the amount of teeth your gears have and multiply again by the vehicle’s axle ratio (which can be found in the vehicles supporting documents). Purchase the necessary driven gear for your vehicle. Remove the old driven gear by pulling it out of its clips and clip in the new driven gear. Secure the gear housing cover and the speedometer cable back.

If you have an electric speedometer you would start by determining the distance of the test drive you would need to recalibrate or fix speedometer, which can be found in the vehicles supporting documents. 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. Now that you know how to fix speedometer calibration, you can get those new tires you have been eyeing.

If you decide to have this done correctly and safely by a professional, you can rely on Safety Restore to get it done for you. Their services are fast, affordable, and accurate. Visit to learn more.

How to Repair a Speedometer

Do you know how to repair a speedometer?

If you have owned your vehicle for quite some time now, you’ve probably seen your instrument cluster become faulty or noticed that some of the gauges broke over time. You probably mustered up the money and purchased a brand new instrument cluster at the dealer for about $750, excluding taxes and fees. The price was not something you were happy about, but rather something you thought you had to pay out of necessity. However, what if I told you how to repair speedometers, or that if you do go to a professional, it doesn’t have to cost $750? If I have caught your attention, read on.

Let’s start with how to repair speedometers. Many people do not know that an instrument cluster can be repaired from home—but it certainly can be done. It just requires some time, patience, and some good instructions. The steps on how to repair an instrument cluster are as follows.

First, the instrument cluster must be removed out of the vehicle. In order to do that, the emergency brake should be engaged, and then the plastic trim around the cluster removed. The steering wheel should then be tilted down and the shifter placed into 1st gear. After that, the trim can be pulled out and removed, as well as the 4x screws holding the cluster. Finally, the cluster can be pulled out and the wiring disconnected. Once these removal steps are completed, the actual instrument cluster would need to be disassembled. After all the parts are visible, any defective gauges or gears should be replaced with new ones. It is best if 100% OEM parts are used to replace the original ones. When replacing the unit into your vehicle, you’ll want to make sure you no longer have any fluttering, dead, sticking, or incorrectly reading speedometer fuses.

Of course, you may just not be the hands-on type of person. Or, you just don’t want to get your hands dirty. Either way, like I mentioned, you don’t have to pay $750 for speedometer repair. Instead, you can turn to the company Safety Restore. Safety Restore specializes in repairing instrument clusters, and the best thing is that it only charges $118.99 for the service!

How to Repair a Speedometer

How to Repair a Speedometer

A speedometer indicates how fast the vehicle is traveling at any given moment. The odometer tells us how far the vehicle has traveled. They work hand in hand to determine if any services are needed, and to help keep you driving safely on the road. Having a properly calibrated speedometer is very important when your vehicle is on the road.Tire diameter, tire wear, tire temperature, pressure, vehicle load, and differential gearing can all have an effect of the speedometers reading. There are also other reasons as to why the speedometer is not working. Here are some scenarios and how to repair speedometer based on them.

First one, is if the speedometer is simply dead. In an older car, the culprit may be the cable that is connected from the transmissions to the speedometer. In cars produced after 1990, the speed sensor may have crashed or have a fault speedometer head. A professional like SafetyRestore would need to help you here.

If the check engine light came on after the speedometer stopped working this may be a result of the speed sensors. They may stop sending data to the vehicle’s computer so when the computer makes an attempt to calculate the road speed, it lights the check engine light. Replacing the speed sensor should solve this issue.

Bouncing or jerking of the speedometer may be the result of bad wiring or a faulty speed sensor. Usually, the wiring needs to be changed, or the sensors need to be re-calibrated.

The speedometer also needs to be calibrated if the tires on your vehicle have changed.

Safety Restore is a professional post accident restoration company that can do the cluster repair for you. You can save up to 80% when repairing with them. Their expert technicians use 100% OEM parts, backed by a lifetime warranty. With a 24 hour turnaround on all repairs, your speedometer will be working like new in no time! Visit for more information on how to repair speedometer.