American Expedition Vehicles

ProCal Module

Part Number:

In stock


All currently shipping AEV ProCal Modules work up to and include the 2017 JK Wranglers.

AEV's ProCal Module is a hand-held powerhouse! This essential tool provides JK owners an easy, low-cost way to make a variety of useful changes not offered by the dealer or any other re-programmer. Topping the list is the ability to correct the speedometer and gear ratio when larger tires are installed. When the speedometer is left uncorrected, there is a major degradation in the performance of the stability control (ESP), transmission shifting, and engine performance.

The best part of the ProCal is that it isn’t just for correcting the speedometer. The Tire Pressure Monitoring System can now be recalibrated to better suit aftermarket tires without triggering the dash light. Further, the ProCal Module makes it possible to activate daytime running lamps, “one-touch” turn signals, enable a temporarily increased engine idle speed for winching, clear engine codes, and even has a feature to help alignment technicians align the vehicle perfectly for optimal ESP performance.

The ProCal Module is equipped with a series of easy-to-use DIP switches. By reading the simple Quick Reference Guide included with the ProCal module, a user can quickly dial in a code for the desired recalibration. Once the DIP switches are set, simply plug the Module into the vehicle's OBDII. The whole process can be completed in mere minutes and it's just as easy to restore the vehicle back to its original settings with the ProCal.

Please note:

  • The AEV ProCal will enable axle gear ratio changes to be made to Wranglers equipped with the A580 Automatic transmission (2011+ 2.8L, 2012+ 3.6L)
  • The AEV ProCal cannot change axle gear ratios for 2011+ 2.8L CRD diesel Wranglers with manual transmissions.
  • AEV's ProCal Module now features an all-new Transfer Case Calibration function that allows customers to install a non-stock transfer case into their 2012+ JK Wrangler (w/ A580 trans) without causing the vehicle to go into limp mode. This includes 2-speed Atlas transfer cases as well as Chrysler's Command-Trac NV241 (Sport/Sahara) and Rock-Trac NV241 (Rubicon) transfer cases.This new feature is only found on the latest version of the ProCal Module (part number 30406007AG). As of 2/18, all ProCal Modules being shipped from AEV are the latest version and include this function.

Key Features:

• Correct speedometer
• "One touch" turn signals
• Clear engine codes
• Easy to use DIP switches
• Recalibrate tire pressure monitor
• Increase engine idle speed
• Optimize ESP performance
• Transfer Case calibration (2012+ JK Wrangler w/ A580 trans)


Application: 2007+ JK Wrangler

Made In: United States


Due to updates in vehicle electronic systems and the existing code on inventory, some Procal modules were made before the changes required for newer vehicles. Please take a look at the part number on the module itself (not the box), there should be a white sticker with a part number, the last two letters of that part number are the revision.

AA/AB/AC – Works from 2007 up to 2011 (these early Procals may not have a label, if your Procal does not have a part number it is likely an AA, AB, or AC)

AD/AE/AF/AG – Works up to 2016

Downloadable Instructions

Difficulty Level: Easy

Estimated Install Time: 10 minutes

Click Here to download the User Guide

Click Here to download the Quick Reference Guide

Outstanding, I would have paid double

Review by monsterjeeper

So I lifted my brand new jk, it was awesome for the first drive of course. The initial blinding bliss of a jk on 35's was quickly overcome by why does this shift so weird? why are there lights on the dash, why is my speedo so far out from my gps, nothing feels right. the guys at the local 4x4 shop recommended a calibration unit. I did my research and purchased the ProCal unit. what an amazing turn around, I never could have expected this to work so well and so easy. It's a whole new Jeep, the trans shifts better, speedometer is dead on, seems to have more power and better acceleration, much better manners under heavy breaking. the one touch lane change option and the daytime running light features are just added bonuses. I wish I did it sooner and I would have paid double! I recommend this to anyone with a jk! Great product, great price! Thank you to AEV!

AMAZING! Worth it's weight in gold!

Review by Haleigh 2013Gecko JK

finally broke down and spent the money and it was the best decision i ever made! my jeep shifts when its supposed to and im getting much better gas mileage then i was before and i actually know how fast im going now! most definitely worth every penny. its a must buy!


Review by ADDDIRT

Bought this to correct my speedo after a tire change. Also came in handy to re-program the TPMS light pressure and activate daytime running lights. Well worth the investment!

Painless to use

Review by Vryce

I just upgraded to 33's and using my ProCal was very easy and quite painless. If you're looking for an affordable programmer this is one to get.

Works as advertised and Great Pricing

Review by Kenny

Added lift and 35's to my 2013 MOAB. ProCal is a must to adjust for the bigger tires. Settings automatically adjusted shift points, and calibrated speedodmeter. Speedo exactly on with GPS/NAV. However user guide had instructions for steering wheel center during alignment which is very important for the stability control, Instructed to see quick guide, although ProCal settings are not on quick guide. Im sure this is a recent update that did not get printed and my shop was able to accommodate the electronic sensor steering wheel center that is on the 2013.
Overall I would highly suggest this programmer if changing tire sizes or gears, your JEEP will run much better and you will save $ on the extra fuel.


Review by T ravisB

Hats off to AEV for selling this product directly to the public. The fixes that this unit made (in literally under 3 seconds) I would expect to pay a shop $200+ for each time I needed it. And the beauty is that you can use and reuse as many times as you like for your vehicle. It is incredibly simple to use, reasonably priced, and very well thought out. Nice job guys.

Works great

Review by Idaho

Easy to use and works great! Thanks AEV.

Hard to find anything better for $150

Review by Jeff 2012Rubicon

If you are going to do any mods to a JK this is a must have.
Gear changes, tire size changes and so much more. Easy to use and has never failed me.
Excellent Product!

Awesome A must Need!

Review by Bronson (DTC)

Simple. Wish I would have gotten this sooner. Thanks Mike


Review by KC

after 35's it drove ok, but when i decided to get my 4.88s put in, the pro cal is a must have! drives awesome and no more guessing my speed !

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