You need a flashpaqs instead of the flashcal. I'm not on 37's but couple guys I know are with 37's and the flashpaqs does a lot better tuning than the flashcal, a lot more options and you can adjust shift points. I am on 35's and 3:73 gears on mine and I haven't felt the need for regearing with the flashpaqs. I adjusted mine properly,got my shift points right and I burn around 2200 RPMs at 79-80 mph. In the mountain regions, smokey mountains of NC, I can still climb steep hills and only be around 3500 RPMs, that's on a JKU auto trans. IMHO if your running 33's or less the flashcal is a good buy but if your over 33's the flashpaqs really works tons better for your setup.I'm about a half hour from you, near Cranberry Twp.
I have 37" tires and 4.88 gears, currently use the SuperChips FlashCal to correct for gearing and tire changes.
I do also see the odd gear hang issue while going up the steep western PA hills, where your nearly at redline and the trans will not shift even if you let off the throttle. I assumed it was that the output shaft load transducers, accelerometers and gyroscopic sensors "see" that I am on a hill, under load... and they forbid the shift due to an out of calibration issue. That assumption is because the issue is not there while on stock tires and gears.
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