4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Speedo Recalc

Old 01-04-2008, 04:30 AM
  #1  
Novanutcase
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Default Speedo Recalc

After putting 4:10's in my car my speedo is off. Is there a cheap and easy way to fix this. I have a 2003 GT.

John
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Old 01-04-2008, 05:13 AM
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99GTvert
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Default RE: Speedo Recalc

Cheapest way I can think of is to get a speed calibrator from AM.

http://www.americanmuscle.com/speed-...tor-94-04.html

About 100 bucks with the discount code. Other than that, don't know what to tell you. You could get a dyno tune if you want to spend more money. It is more expensive but your car will probably run better, and with the dyno tune the tuner will be able to adjust your speedo to read the proper MPH.
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Old 01-04-2008, 11:16 AM
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xmikevankuikenx
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Default RE: Speedo Recalc

Cheapest = Speed Calibrator
Easiest to calibrate = Handheld tuner

If you get a handheld tuner,the company you buy it from will give you a couple tunes for your specific carand they will accomodate your gears into all of the tunes. The speed calibrators need to have wires spliced, if I'm not mistaken. If you were planning on getting the tuner at any time in the future, you might as well go ahead and get it now.
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