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Reviews for Superchips 3571-JL Flashcal Programmer for 18-24 Jeep Wrangler JL

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Emilie S.
8/31/2018
5

If you are going with larger tires on your JL, factor in the $249 for the cost of this programmer i addition to the new tires and rims. I put Toyo OpenCountry AT2 35x12.50x17 tires (no lift) on my '18 JL Rubicon 2 days after I purchased it. The computer was forever searching for shift points. My gas mileage dropped substantially (20ish to 13ish mpg). After using the Superchips Flashcal F5 Programmer to program the tire size (34.5), the computer now shifts smoothly and on my first tank, I am back at about 19mpg. A few things are left out of the owner's manual and the SuperChips YouTube video. You do not "easily" unplug the two wires and replug them into the Jumper Module. (They stay permanently plugged into the Jumper Module) Getting your hand in between and above the OBD2 port to initially unplug the two wires is quite difficult. There is no room for a 2nd hand and no room for a screw driver. I could press down on the release clip (at the back of each plug) but not pull each out at the same time. I ended up going to my local garage and one of the mechanics (complaining and then nursing the cut he got from the under dash) was able to unplug them. I plugged the programmer into the OBD2 port. I have a push button start, so pressed it TWICE to achieve the ignition ON without starting the engine. It took me less than 2 minutes to adjust tire size and turn off the seat belt notification. There are a hundred more adjustments that can be made using the programmer. Once finished, you unplug the programmer. Additionally, I have to mention and give a big thumbs up to SuperChips for being able to update the programmer on a Mac! Programmer updates can be done on a Mac or PC! Highly recommended and a necessity if you are going with larger tires.
Chema G.
4/4/2022
4

Is valid to 2.0T?
Jason B.
11/9/2020
4

It has worked since I re-calibrated my JLU's speedometer for larger tires in 2018. Only draw back is that in Jan 2020 I cause my Nav to jump around. Dealership said once they removed the box it jumped back to the correct coordinates.
ROBERT S.
9/6/2020
1

Bad info here in the specs section. Purchased this about 3 months ago for my 2020 EcoDiesel, because that engine is listed in the specs here on this site. EcoDiesel is not supported. Pretty pissed.