Superchips for JL

Deezus

New member
I thought that when reprogramming for tire size on the JL we didn't need to measure the tire? I just put in 37s in the SC and my speedometer was off 3mph. As soon as I put in actual tire measurement speedometer was accurate. Any one else have this experience?

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wayoflife

Administrator
Staff member
I thought that when reprogramming for tire size on the JL we didn't need to measure the tire? I just put in 37s in the SC and my speedometer was off 3mph. As soon as I put in actual tire measurement speedometer was accurate. Any one else have this experience?

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That is ONLY with the TAZER JL or when going to your dealership. Superchips typically uses ACTUAL tire size.
 

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