AEV PROCAL MODULE Important Notes: Sold individually WILL enable axle gear ratio changes to be made to JK models equipped with A580 automatic transmission (2011+ 2.8L, 2012+ 3.6L). CANNOT change axle gear ratios for 2011+ JK models with a 2.8L CRD diesel and a manual transmission. Transfer Case Calibration function allows you to install a non-stock transfer case onto 2012+ JK models with a A580 transmission without causing the vehicle to go into limp mode. This includes 2-speed Atlas transfer cases as well as Chrysler's Command-Trac NV241 and Rock-Trac NV241 transfer cases. Description: The AEV ProCal Module allows you to make a variety of useful changes to your Wrangler JK that are not offered by the dealer or any other re-programmer. It gives you the ability to correct the speedometer and gear ratio when larger tires are installed. This is especially useful because when the speedometer is left uncorrected there is a major degradation in the performance of the stability control (ESP), transmission shifting, and overall engine performance. The Tire Pressure Monitoring System can also be re-calibrated to better suit aftermarket tires without triggering the dash light. This module can also activate daytime running lamps, allow for "one-touch" turn signals, clear engine codes, enable a temporarily increased engine idle speed for winching, and can help alignment technicians align the vehicle perfectly for optimal ESP performance. It is equipped with a series of easy-to-use DIP switches that can be set before plugging the module into your Jeep's OBDII. The included Quick Reference Guide has all of the codes for desired re-calibration. It takes only minutes to complete the entire process and is just as easy to restore the vehicle back to its original settings. Product Details: Corrects your speedometer Easy to use DIP switches Optimizes ESP performance Ability to clear engine codes Can increase engine idle speed Recalibrates tire pressure monitor Transfer case calibration available Allows for "one touch" turn signals Takes around 10 minutes to install Made in the USA Parts Included: (1) AEV ProCal Module Instruction Manual DIP Instruction Sheet YEARS MAKE MODEL 2007-2018 Jeep Wrangler JK Unlimited 2007-2018 Jeep Wrangler JK ADDITIONAL INFORMATION SKU AEV-30406007AG Variant ID 7214505 Brand AEV Part Type Engine Power Tuner SKU Aliases 30406007AG