Reviews for Superchips 3571 Flashcal F5 Programmer for 07-18 Jeep Wrangler JK

I put on a leveling kit and 33.7 inch tires. My speed was way off and the jeep didn't shift when it should have. I knew I needed this but was a little nervous about using it. It took me ten minutes. And now my jeep runs like it should. The menus were super clear about what had to be done, when to turn on your ignition, etc. The Flashcal did EXACTLY what it was supposed to do and was so user friendly anyone could use it. Now that the tire size is changed, it will stay in the tool kit to diag codes. Buy this with confidence.
Wrangler Unlimited Sahara 2015.

Simple and easy, used many times no problems. Will upgrade to preformace tuner after the warranty expires on my jeep

Works great, very simple to use corrected my tire size and now my whole computer works as it should. Highly recommended and soon to be upgraded to Flashpaq

If you've increased your tire size on your Jeep JKU you need this calibration tool. Set my tire size to 35" and the transmission now shifts when it's supposed to. And the speedometer is now correct. Took all of 10 min. to calibrate

Reliable and easy to use. It's also up-gradable, I updated mine to a flashpak. Now I cant change the tune as well as calibrations like tire size, gear ratio...

Does what I ordered it for and more. On my Rubicon it locks axles in high range even in 2X.
I definitely recommend.

If you are running bigger tires you need this! After putting 35's on my JK my MPG when south and I found that I was driving about 10mph slower than what my speedometer was showing. After reprogramming with this my mileage is back up to what it used to be.

Easy to use, essential for newer Jeeps, update it BEFORE you use it, performed flawlessly.

Does what it says. My speedo is now accurate again and no more annoying TPMS warnings.

upgraded to 35 and I was doing my research. Some says that I would need to change gears....then I, came across this. It was a game changer! My transmission was confused when i changed to the 35's before programing the Jeep's computer. After plugging this in and programming my Jeep's computer...Went back to normal. Must have if you are replacing/upgrading to bigger tires.