Adjusting speedometer

[torque beast]

I have a h&s that I am fixin to put on when I put on my lift but just realized that speedometer can only be adjusted up to 34" tires. Would like to hear from h&s if they are working on being able to run bigger tires or maybe someone here already knows.



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[DillonC]

what size tires are you putting on? from the factory your speedometer already reads a couple mph fast for some reason so if youre running a 35 or maybe even a 36 inch tire it should be almost spot on.

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[torque beast]

Wanting to go 37's but want my speedo to read correct

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[redrider8293]

The problem with these trucks is that the speedometer can only be set to the largest tire that you can get from the factory


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[torque beast]

Is that something in the computer that can't be changed by aftermarket?


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[DillonC]

yeah but if you get it set to the highest setting even though it'll say a 34 inch tire it'll be almost spot on with 37s since your speedometer reads a couple mph fast from the factory.

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[vcura]

Idk about the speedometer being high. I have 36s on my '06 now and my speedometer is about 5 mph slow @ 50mph. at higher speeds around 80 it is about 8 mph slow (Ive never adjusted it from the factory)

[torque beast]

Yep, I will be about 10mph slow compared to what I'm running now. I miss my dodge where I could adjust up to 44"


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[ragnarbronco]

can someone post a link or walk me through how to adjust the speedo to begin with? i have a 04 excursion and i just put slightly larger tires on it. not a huge increase but i do want mileage and speed to be correct. cops around here are a$$holes....thanks.

[STROKIN11]

^^BUMP^^
I have same issue in that I lifted 4" and went from 245 factory tire to 35" Toyo's..Really not worried sooo much about the speedo but really care about the odometer being off for many reasons i.e. resale, maintenance etc..