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Unread 09-06-2013, 11:39 AM   #1
huntb
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2008 KK Liberty 
 
Join Date: Aug 2011
Location: Grand Haven, MI
Posts: 613
Calibrating/Correcting Tire Size

Just wondering... I have a Hypertech programmer that can change tire size (at least it says it can. Never been able to get it to work with my 30" tires).

When the programmer changes the tire size does it only correct the speedometer or does it also correct at what speed the vehicle shifts so that it shifts within the proper RPM range?

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Unread 09-06-2013, 08:13 PM   #2
lfhoward
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2008 KK Liberty 
 
Join Date: Nov 2012
Location: Morrisville, PA
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Gageraid? Calling Gageraid...
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2008 Liberty Sport 4x4 Automatic
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Unread 09-06-2013, 10:06 PM   #3
Cobradwight
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2012 KK Liberty 
 
Join Date: Jun 2013
Location: Victorville, Ca
Posts: 71
It's just supposed to correct the speedo .
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Unread 09-09-2013, 07:26 AM   #4
Gageraid
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Join Date: May 2012
Location: Branchburg, New Jersey
Posts: 1,483
Quote:
Originally Posted by huntb View Post
Just wondering... I have a Hypertech programmer that can change tire size (at least it says it can. Never been able to get it to work with my 30" tires).

When the programmer changes the tire size does it only correct the speedometer or does it also correct at what speed the vehicle shifts so that it shifts within the proper RPM range?
They say it "corrects speedometer readings and part throttle shifting." There's a few YouTube videos on it.
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