Hypertech Speedometer Calibrator Review 2012 JK
Hey guys, just wanted to a brief write-up regarding the hypertech speedometer calibrator and recalibrating a 2012 automatic jk with bigger tires.
I have the 752001 unit (04-10 Chrysler gas truck/SUV) which came with my Jeep from the dealer. I have a 2012 jk automatic with 35's and stock 3.73 (lift installed by the dealer). Couple things:
1.) Take the time to measure your tire height as it does make a difference when programmed (as I'm sure many of you know by now). I had to enter in 33", even though I have 35's, to get the speed correct (my true height was about 33.75"). This doesn't sound so horrible but brings me to my next observation....
2.) The shift points at 33" are not bad, however, 3rd revs very high (almost 4k) when accelerating at highway speeds. Also, when just cruising at 60-65mph, the transmission likes to hang out in 4th gear and often I have to up-shift manually to get the rpms down a bit more, which is a big deal because of gas mileage. Now when I say RPMs, I mean from 2300k or so in 4th, down to 17-1800k in 5th.
I have an AEV 2012 procal on the way and plan to reset back to stock with the hypertech and see if AEV's programming is better suited for the 2012 3.6L, even though my current unit technically "works" with the car, I still have some doubts with the hypertechs true compatibility with the pentastar engine (it is not listed on their site or packaging to truly be compatible). I will follow-up when it gets here and please don't think I am hating on Hypertech...the unit is great to use but partial throttle shifting is really a big deal, at least to me, and I would imagine for anyone with DD on bigger tires.