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Old 09-04-2015, 06:32 PM
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Tuner for Speedometer??

I have a 2014 diesel limited and just put 275/65/r18 tires and a RRO lift on it. I wanted to know if there is a tuner or anyway to recalibrate the speedometer for the bigger tire size ?


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Old 09-05-2015, 11:14 AM
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Re: Tuner for Speedometer??

As far as I know, this is now a changeable parameter.
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Old 09-05-2015, 08:11 PM
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Re: Tuner for Speedometer??

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Originally Posted by WK2Kev View Post
As far as I know, this is now a changeable parameter.
how does one make the change? Thx!
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Old 09-05-2015, 08:50 PM
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Re: Tuner for Speedometer??

One doesn't. I understand there was on previous versions of GC's. The tire on the currents GC's are basicly the same circumfrence.
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Old 09-06-2015, 09:00 AM
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Re: Tuner for Speedometer??

The factory tires are 30.4" I believe and mine are 32" so the speedometer is off by about 4% ... I heard it is not adjustable from Jeep so I was curious if a tuner/chip can help


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Old 09-09-2015, 08:56 PM
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Re: Tuner for Speedometer??

Quote:
Originally Posted by WK2Kev View Post
As far as I know, this is now a changeable parameter.
I think this is supposed to say "not changeable" vice "now."
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Old 09-10-2015, 06:48 AM
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Re: Tuner for Speedometer??

Haha that makes more sense


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Old 09-10-2015, 10:11 AM
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Re: Tuner for Speedometer??

I have 33" tires on my 2014. The dealer can change tire size for the vehicle, but they can only select the size from a few choices. They selected the biggest tire from the list for mine. Right now at 60 MPH on the speedo I am reading 63 on GPS. At 40 MPH I am reading 41.5 on GPS.

I have not been able to come up with an aftermarket device to truly correct the speedo to date.
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Old 09-12-2015, 01:38 AM
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Re: Tuner for Speedometer??

Diablosport is supposed to be coming out with something soon. Some add on piggy back computer that will work to adjust speedo.
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Old 09-12-2015, 06:26 PM
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Re: Tuner for Speedometer??

Quote:
Originally Posted by dtc1435 View Post
I have a 2014 diesel limited and just put 275/65/r18 tires and a RRO lift on it. I wanted to know if there is a tuner or anyway to recalibrate the speedometer for the bigger tire size ?


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