Chance53

Well I purchased the Flashcal over a year or so now and adjusted my tire size (35") and was done with it. I was under the opinion since then that my speedometer has been fixed and is set to the correct speed. Until I was following my father on a road trip and I couldn't figure out why he was driving at 85+ miles an hour. Long story short the Flashcal did not recalibrate my speedometer, has anyone else experienced this issue? Also is there a different Flashcal for 7-11 jeep and 12-15 jeeps. mines is a 2014 so maybe this unit was made for the 3.8ls?