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Trust me you can take it to a shop they can do it you cant unless shown how to, its not easy.Easy way is to get a buddy to drive next to you and see how fast hes going compared to you.And you will know how much slower you are and you can adjust your speed using your brain!! Always a good thing!!!!! You can also use this formula (before driving is preferred) to figure your actual speed:

(NEW tire size / OLD tire size) * Speedometer reading = Actual Speed

For example going from the stock 235/75R15 to 31x10.50R15 would go like this:

(31/28.88) * 75 = 80.5

there is a small gear on the end of your speedo cable at the trans.the gears range from 16 teeth to 21 teeth each tooth is good for about 5 mph.count how many teeth you have now .determine desired adjustment and add or subtract teeth needed to get correct speed .pick up at dealer by saying i need a 18 tooth drive gear or as needed.

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โˆ™ 2011-01-15 03:03:32
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Q: How do you adjust your speedometer on a 93 F-150 after changing the tire size?
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Related Questions

How do you adjust the speedometer on a Ford F-150?

A guage/ auto electric or speedometer shop can recalibrate the speedometer to adjust for bigger or smaller tire size. Why do you want to know that?

Does tire size change speed?

It does not change the actual speed of a vehicle but changing tire size can affect the accuracy of the speedometer.

Is there a fix for a Kawasaki Vulcan speedometer which reads low speed?

It will depend upon your bike. Older vulcans used a mechanical speedometer (a cable runs from the front wheel to the back of the speedometer. I don't know of a way to adjust these. other than changing your tire size (not recommended). Newer bikes use an electronic speedometer, and for this there is a fix. A little device called Speedohealer. It took a few tries to calibrate, but now my '07 1500 reads dead on.

How much will the speedometer change if you go from a 15 inch rim to a 14 inch rim?

It wont. They will only change when you increase/decrease the size dramatically as the wheel or tire. A one inch change wont make a difference.A more accurate answerIt's true that the size of the rim does not directly have any impact on the speedometer accuracy. But changing the rim size generally means that you'll be changing the size of the tire. The speedometer is directly affected by the circumference of the tire that is used. If you use a tire with a 10% larger circumference, the speedometer will indicate that you're going 10% slower than you really are. If you match the circumference of the 14 inch tire to the circumference of the 15 inch tire, the speedometer accuracy will not change.

How do you recalibrate 1991 S10 speedometer?

This truck has an electronic speedometer. There is no speedometer drive cable, and therefore no drive gear to change to adjust the ratio. You can buy a box for around $170 that is inserted into the sensor circuit to adjust the speedometer readout. You can figure out how to reprogram the speedometer. Those are the options I have found. I am dealing with this issue on my girlfriend's son's S-10. Further research found this reference, which looks good to me. This weekend, I'm going to find the DRAC module and modify it according to the directions. The electronic module is very specific. Is it worth spending the money just to "calibrate" the speedometer. What are the symptoms of the uncalibrated speedometer. Wheel size change. Tire size change. It would be cheaper and faster to just have a dealer do it then you wouldn't have an expensive piece of useless equipment taking up space

How do you adjust your speedometer after changing sizes of tires on a 98 prelude?

Many speedometer shops do it routinely. If it off significantly, they change the little gear in your trans that turns the cable. It's od determines ratio which determines what you see. I have heard a digital is easier but no adjustment can be made until it is determined how far off yours is by running on a dynomometer type machine. If tire size is close to original, discrepancy is negligible.

Will 24 inch rims mess up your transmission?

No, changing the size of your rims and tires will not mess up your transmission. It will mess with your gas mileage and your speedometer though.

How much does tire size effect the speedometer?

The answer depends on the size of the tire in relation to the original tire size. A tire with a smaller circumference will turn more at a given speed, which will cause a higher speed being displayed on the speedometer. A tire with a larger circumference will lead to a slower speed being displayed. The speedometer can be calibrated to correctly display the speed for a different tire size. Changing the size of tires on a vehicle will also change the way the vehicle handles and may cause faster wear on suspension components.

Does the iris adjust the pupil?

Yes. The pupil is a hole in the iris, a hole that lets light in through the lens to the retina. Changing the size of the iris thus changes the size of the pupil.

Will the change in tire size effect the speedometer?

if the diameter will be greater or less then the speedometer will be effected

Can you put 205 tires on a vehicle requiring 215?

Yes, but changing tire size affects driving characteristics, fuel economy, and speedometer accuracy among other things.

Does size of tires make a difference in the speed and speedometer?

If you change the size of the diameter of the original size of tire , YES If you go LARGER in diameter , you will actually be going FASTER then your speedometer indicates and If you go SMALLER in diameter , you will actually be going SLOWER than your speedometer indicates

Can 215R65 16 tires replace 225R65 16 tires for Subaru Outback?

They can but changing tire size will change speedometer readings and the way your car handles. You also must have all four the same size. There is a link to a tire size calculator in related links.

Do Chevy Impalas have a history of faulty speedometers?

Speedometer gears are made of plastic or nylon they wear out. Changing Tire diameter can also mess with a speedometer. Tire size change can be corrected by getting the right sized speedo gear install to correct for the change in tire diameter.

How do you adjust the size of a friendship bracelet?

To adjust the size of a friendship bracelet you can go to any jewelry store and get different estimates to have them adjust the bracelet to fit your wrist.To adjust a handmade friendship bracelet, depending on how it is made, you either slide the knots along the string to adjust or you untie, adjust the size, and retie the knot.

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Why does my Speedometer read faster than I am driving?

The size of tires can effect that accuracy of a speedometer. Larger tires will cause the speedometer to read less than you are actually going.

What are the consequences of changing a field size in a database?

what are the consequences of changing a field size

How do you reset speedometer on 1996 Chevy Silverado Have changed tire size?

It will need to be recalibrated at a shop that specializes in speedometer repair.

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Does putting bigger tires on a car affect the handling?

Putting larger tires on your car will give you higher top spee with less torque. However, changing the tire size will make your speedometer inaccurate.

Why does a speedometer stop working on a 1991 Chevy blazer full-size?

Broken cable?

Can F150 engine work in a expedition and what needs replacing?

Year for year and size for size they are a direct swap. In other words, a 5.4 from an F150 is the same as a 5.4 from an Expedition. There are also years that will interchange but I am not certain which ones are direct swaps. The Expedition is based on the F150 platform.