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So your saying if the speedo is correct then the Odometer is correct?It is all run off the speed sensor. however the dic does not use the odometer to make its calculations. It uses fuel consumption based on speed and stored tire height. Generally if your speedo is correct manually doing it will be the most accurate

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When I changed it to 456 the speedo was right on. It was 7 off when using 410. That was both with correct tire size.

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idk how that's possible :think:When I changed it to 456 the speedo was right on. It was 7 off when using 410. That was both with correct tire size.

was the speedo right on at all speeds or just one speed where u checked at? How are u confirming speed?

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this....u need the roll out of the tire, then divide it by 3.1416...that will give u ur actual tire diameter. I use a thick blob of white out, drive fwd a bit so u get the blob on the ground...add some more white out to the tire and drive fwd again to get another dot on the ground...measure the distance between the 2 white dots, that's ur roll out.Did you put in the actual height of the tire or 35 or 33. It will take some work to get it exact. But if the speedo is correct it's fine

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2 ways used another vehicle and used gps on phone both read the same.idk how that's possible :think:

was the speedo right on at all speeds or just one speed where u checked at? How are u confirming speed?

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I have a tire roll out gauge I will use and see what it is. As of know I have just been putting in 35.this....u need the roll out of the tire, then divide it by 3.1416...that will give u ur actual tire diameter. I use a thick blob of white out, drive fwd a bit so u get the blob on the ground...add some more white out to the tire and drive fwd again to get another dot on the ground...measure the distance between the 2 white dots, that's ur roll out.

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That is your problem. What is your turner asking for height of tire or the circumference? Most ask for height. Most 35s are not 35" tall. Get a tape measure and measure the height. The tuner should do the math for yaI have a tire roll out gauge I will use and see what it is. As of know I have just been putting in 35.

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129 Posts

It ask for tire heightThat is your problem. What is your turner asking for height of tire or the circumference? Most ask for height. Most 35s are not 35" tall. Get a tape measure and measure the height. The tuner should do the math for ya

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129 Posts

Yes it was right on from 5 to 75.Then you need to measure the actual height of your tire but that won't work since you don't have a matching gear in the tuner. Like Eddie said did you check your speedo and mutiple speeds

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