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Speedo Correction

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Old Mar 24, 2011 | 04:49 PM
  #1  
barthel's Avatar
barthel
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Laughing Gas
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Joined: Feb 2011
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From: Newberry Springs, CA
Speedo Correction

Hey Guys,

Checked my speedo the other day, between tires (315's) and gears (4.30's) my speedo is off. It's only off by 5 or 6 miles per hour at 65MPH, is there a quick/easy way to correct it?

 
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Old Mar 24, 2011 | 08:31 PM
  #2  
Benchwrench's Avatar
Benchwrench
Fleet Mechanic
15 Year Member
Joined: Jan 2007
Posts: 1,708
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From: Circle City
Most of the factory speedos' are off.
I purchased taller tires and by chance corrected it.
GPS confirms it's to the mile now.
You might have to take it to the dealer to have it re-calibrated. I went through this before on another diesel when I changed gear ratios.
 
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Old Mar 24, 2011 | 11:24 PM
  #3  
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Sparky04SD
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From: Lynden, WA
Any good deraler can correct this with a calibration. I had this done when I went to 315's on my truck. Pretty painless, cost me $60 back in 04.
 
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Old Mar 25, 2011 | 08:35 AM
  #4  
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89LX306
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If you have or know anyone with Auto Enginuity you can correct it there. That's how I did mine.
 
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