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Speedometer Calibration on 6" w/ 35s

EJ7M

By EJ7M
in Modifications, Wheels & Tires

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EJ7M New Member

EJ7M

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Was curious how some have gone about re calibrating the speedometer on a set of 35" tires. Im mostly interested in getting the MPG reading to be as accurate as possible. 

rikhek Enthusiast

rikhek

Posted
Posted

I recently installed 35's on my AT4 and found only two options for recalibrating the speedometer.  Both Rough Country and Hypertech sell calibrators for $200 and $230 respectively.  My speedometer is off about 4 mph at ~70 mph.

 

I haven't bought either as I can live with it being off instead of spending over $200 just to get it correct.  Additionally, there are numerous discussions on this forum and elsewhere online by numerous purchasers reporting functionality issues with both units.

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  • 3 weeks later...
Shoup1cobra Enthusiast

Shoup1cobra

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I used the hypertech. I tripped a code/engine light after a month or so. I had Autozone clear it and it's been solid ever since. 

eppieguy Senior Enthusiast

eppieguy

Posted
Posted

I used Hypertech as well, no issues for a year / 10k+ miles.

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