Calibrating for Tires???? - Ford Powerstroke Diesel Forum
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Old 03-17-2008, 04:41 PM
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Calibrating for Tires????

What do you guys use to calibrate the speedo on a 2005 F350 for larger tires Do you use a tuner of some sort?

Last edited by Chiller; 03-17-2008 at 04:46 PM.
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Old 03-17-2008, 04:42 PM
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Old 03-18-2008, 06:45 AM
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Old 03-18-2008, 06:53 AM
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Superlift Tru-speed. I just installed mine about a month ago and it works great. Even helped with shifting now that the speedo is in tune with the pcm.
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Old 03-18-2008, 06:56 AM
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The tru-speed works with 37s? How much did it cost.
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Old 03-18-2008, 07:06 AM
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+1 for the truspeed... i have 37's and i scored mine off ebay new for 130 bucks
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Old 03-18-2008, 07:12 AM
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You can go up to about a 36" tire with the factory stuff. They just go in and change the programming. If you don't mind for it being off just a little, you could get that done for free or little cost. If not, I would go with the truspeed.
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Old 03-18-2008, 07:38 AM
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I got mine done the dealership. Calibrated the abs sensor(same as the tru-speed) and they adjusted the speedometer. Cost me about half the tru-speed, and no shipping delay.
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Old 03-18-2008, 10:33 AM
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Quote:
Originally Posted by dlonno View Post
Superlift Tru-speed. I just installed mine about a month ago and it works great. Even helped with shifting now that the speedo is in tune with the pcm.
did you change the setting on the SCT for the revs/mile too, or leave it alone since you have the TruSpeed on there????

I think I'm gonna have to get a TRuSpeed soon, my speedo is sizeably off....evidently HAULING on the highway is about 65mph right now!
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Old 03-18-2008, 10:44 AM
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+1 more for the Superlift True speed..... ill be putting one on my truck this week....
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