Flascal F5 programmer - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 2 Old 01-15-2019, 11:25 AM Thread Starter
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Flascal F5 programmer

I know some of you run this programmer in your Wrangler just looking for some insight on my situation. Just purchased new Wrangler JK new and running 35's with 3.21 gear, planning on upgrading to at least a 4.56 my concern is will the programmer help or is it even necessary?
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post #2 of 2 Old 01-15-2019, 01:07 PM
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Flashcal will do what you need to change gear ratio and tire size along with a few other items. It is not a “tuner” but a calibration tool.

Some including myself may recommend AEV ProCal for the same money as there are and have historically been features available on that device not elsewhere found.

Edit - yes, some type of calibration tool is necessary when changing tire/gear, especially with auto trans
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