Superchips 3876-JL Flashpaq Programmer | 18-21 Jeep Wrangler JL

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Superchips 3876-JL Flashpaq Programmer | 18-21 Jeep Wrangler JL


Warning: This product can expose you to chemicals that are known to the State of California to cause cancer. For more information, visit

The Flashpaq for 2018-2021 JL Wrangler is packed with an extensive set of custom features, like tire size and gear ratio adjustment, plus real power gains you can feel ro conquer any trail. Since all 2015 and later Jeeps require a PCM swap to tune, please review the Product Details and Features tabs for the steps to prep your vehicle for tuning.

***The required PCM swap is included in the sale price of the tuning kit.***

PCM Swap Options:

Option 1: Cross-ship PCM swap (subject to availability of PCMs)

Once the 3876-JL Flashpaq is received, submit the form found here with the required information: The site's online store will set up a credit card pre-authorization, and place the order to our team for an unlocked PCM pre-programmed for your vehicle. This is all entered online and takes a few minutes. Within 72 hours, the required PCM will be programmed and shipped to you via 2nd Day Air, accompanied with a prepaid return shipping label to send your oroiginal PCM back as the core trade-in.

Option 2: Send in your factory PCM to be unlocked

To begin, just contact technical support with your new Flashpaq's serial number, vehicle VIN, and return shipping address. Once received, your stock PCM will be quickly unlocked and expedited to your return address, ready for reinstalltion and tuning.

** This product does not include tuning support for right-hand drive models sold outside of North America.

2021 Jeep Rubicon 392 is now added for tuning on the Flashcal 3876-JL and Quick Option calibration on Flashcal #3571-JL. The Flashpaq’s preloaded performance tunes for 93 and 91 octane fuel offer increased power and efficiency (MPG), along with the 91 octane compatible Crawl Tune. Our purpose-built Crawl tune has a recalibrated throttle curve (controlling the engine response to pedal input) that is linear, for precise modulation while easing over steep obstacles at low speeds. The Flashcal is the easiest, and by far the most budget-friendly, way to unlock numerous features on any Jeep Wrangler JL from the factory, and still offers the classic adjustments like speedometer correction.


  • Color Screen

  • Speedometer Correction

  • Tire Size - 25'' - 40''

  • Axle Gear Ratio - 2.73 - 5.38

  • T-Case Gear Ratio - 2.72 - 5.00

  • Speed Limiter - Stock/Raised

  • Rev Limiter - Stock/Superchips Value/+256/+258

  • TPMS Threshold Adjust - 22-56 PSI

  • Idle UP - 700-2000 RPM

  • Sway Bar Disable - Unlock/Exit

  • Daytime Running Lights Adjust - None/High/Low/Turn/Fog/Fender

  • Data Acquisition

  • DTC Read & Clear

  • Internet Updateable

  • Performance Tune(s)

  • Tow Tune

  • Crawl Tune

  • Economy Tune

  • TPMS On/Off Available (Download Required) Adjust feature only available on TrailDash/TD2

  • Performance 93 29HP 37TQ

  • Performance 91 25HP 29TQ

  • Performance 87 17HP 18TQ

  • Engage Sway Bar - Sway bar unlock

  • Disable Auto Start/Stop

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