Adjusting the speedometer for larger tires? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 07-07-2010
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Icon5 Adjusting the speedometer for larger tires?

Has anyone been abke to adjust thier speedometer to accommodate for larger tires? If so how did you do it? I recently got a ticket for going 78 in a 60 so i want to get my speedo fixed asap.
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Old 07-07-2010
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what size tires are you running?

and the only way to do it is buy a tuner and program the correct tire size in it.
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Old 07-07-2010
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You can fix it with a tuner. And i think i remember seeing a stand alone thing but i cant remember the name.
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Old 07-07-2010
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ford can do it for you too. i think its like $50 for them to do it but you might as well put that money towards a tuner
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Old 07-07-2010
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Or you can just remember the speed difference

That's what I have to do in my 77, with 33" tires my speedometer is 9 mph off. I just have to remember it, although correcting it is much simpler
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Old 07-07-2010
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Quote:
Originally Posted by redranger04g View Post
ford can do it for you too. i think its like $50 for them to do it but you might as well put that money towards a tuner
only up to a 31" though and if hes 18 off i bet thats not what he has haha
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Old 07-07-2010
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Bro you went 78 in a 60, no speedometer fix other than less gas pedal will fix that. Just always know in your head you're going 5ish mph faster than your speedometer reads.
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Old 07-07-2010
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mine's off by alot more than that...I'm going 80 when my speedo reads 65.

Quote:
Originally Posted by redranger04g View Post
ford can do it for you too. i think its like $50 for them to do it but you might as well put that money towards a tuner
my local stealership told me it would be like $300-something to recalibrate my speedo. those ******* a-holes

Last edited by gts007; 07-07-2010 at 05:53 PM.
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Old 07-07-2010
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the stealership told me the biggest they can flash is ~285
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Old 01-08-2012
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haha since posting this thread i have just gotten used to my speedo being off by 5 mph. When i drive other peoples cars I'm always going 5mph to slow... loooool
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