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Speedometer Calibration

 
  #1  
Old 04-02-2004, 07:27 PM
david_deb
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Speedometer Calibration

I am new to this site and new to Ford ownership. I recently bought a 1998 F-150 with the 4.2L. It has different tires than factory on it so the speedo is off. I've read some posts about using the odometer and inputing a code but mine has an analog odometer so that is not an option.
Is there any way to calibrate the speedo to reflect the differnt tires?

Thank you.
 
  #2  
Old 04-02-2004, 09:52 PM
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Hmm......
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Talk to Ken (webmaster) see if a chip can have that programmed into it. I know on older vehicles there is a gear that be cahnged to reflect cahgnes in gear ratios, tire sizes. I THINK ours is the same way.
 
  #3  
Old 04-03-2004, 08:09 AM
david_deb
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Speedo

I know on some there is a gear in the transmission but on the mazda tranny you have to take the rear housing off to get to it.
 
  #4  
Old 04-03-2004, 10:39 AM
true4.2
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Dude, get a chip from motorhaven from Ken. www.motorhaven.com

Go to the Diablo chip for Fords section. They are $230 shipped to your door. It will totally fix the speedo AND give you some power to turn those big wheels to boot!
 
  #5  
Old 04-03-2004, 11:35 AM
kman2785
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yea,

I agree with true 4.2!

I have 20's on my truck and i am just waiting to get enough money to buy a stage 2 diablo chip!

Do it!

Kman
 
  #6  
Old 04-09-2004, 03:01 PM
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What size tires are you running now, and what were the original size tires.

Here's a link that will tell you how much your speedo is really off.

http://www.intercotire.com/html/true-mph.htm
 
  #7  
Old 04-09-2004, 03:06 PM
horizonhuskies
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I personally think the SCT is a better chip from what Ive read. Go with the diablo if you have no need for custom programing
 
  #8  
Old 04-12-2004, 08:38 AM
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If all you care about is fixing your speedo then just get a "Superlift Truspeed" speedo calibrator.

It's infinately adjustable and can be self adjusted a million times, every time you change gearing or your tire size. I'm probably going to get one since I keep changing gears and tire sizes. Look here.

http://www.4x4wire.com/dodge/reviews/truespeed/
 
 
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