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Ive got a JKUR and the speedometer reads fast at slow speeds, perfect around 55-60, and then slow at high speeds. At around 25 the speedometer reads 30ish, and at 70mph it reads 77. Ive got 4.10 axles, and running 255/70R17 Tires.
Ive got a superchips traildash 2 programmer Im using, and when I measured the tires I got around 31-31.25" diameter. I tried a few different settings, and each one adjusted the range a bit, but never got it to a place im happy with it. Any thoughts on what might be wrong here? Ive had tire size programming issues before and usually the speedometer will read more and more off the correct value the faster you go. This seems to be something of a curve.
Ive got a superchips traildash 2 programmer Im using, and when I measured the tires I got around 31-31.25" diameter. I tried a few different settings, and each one adjusted the range a bit, but never got it to a place im happy with it. Any thoughts on what might be wrong here? Ive had tire size programming issues before and usually the speedometer will read more and more off the correct value the faster you go. This seems to be something of a curve.