2003-2006 Jeep Wrangler TJ Optimized PCM
$349.99
Currently only available for existing and new Wrangler Fix 2003-2006 Jeep Wrangler TJ PCMs. (Other years and models coming soon!) SEND EMAIL TO mark@wranglerfix.com with “LET ME KNOW WHEN” in the subject line and you will be notified. (We do not share any of our customer data with any third parties.)
Currently, Optimized Performance is only available for existing and new WranglerFix 2003-2006 Jeep Wrangler TJ PCMs. WranglerFix Optimized Performance PCMs are engineered for efficiency and power and are tailored to enhance throttle response, increase horsepower, torque across the entire powerband while improving fuel efficiency. With precise adjustments to ignition timing, fuel delivery, and other technical parameters, WranglerFix Optimized Performance unlocks the full potential of your vehicle, delivering a driving experience that is both exhilarating and efficient. Whether you are navigating rugged terrain or cruising down the highway, WranglerFix Optimized Performance ensures your Jeep Wrangler performs at its peak potential.
IMPORTANT: If purchasing a new 2003-2006 Jeep Wrangler PCM, you will have the option to add this feature to your PCM at check out on a purchase of a PCM. If you already have an existing WranglerFix 2003-2006 PCM, use this page to order.
This add-on requires a WranglerFix PCM in order for it to be programmed correctly. If you are using the same email address today as when you made your initial PCM purchase, we will locate you in our system. If you are using a different email address, or if you aren’t sure which email address you used to purchase, either note all of the possible options when you are checking out in the “order notes” box, or put it in with your PCM in the box, or call us to find it for you. If you have your order number of your PCM purchase, please include that in the box, too.
Description
Below you’ll find a review from one of the first TJ owners to test out our new Wrangler Fix PCM tune for 2003-2006 Jeep Wrangler TJs (click here to see the original forum thread):
“I now have the new WranglerFix performance tune. Here are my initial observations:
The process:
Those who already have a WranglerFix ECU send their existing unit back to WranglerFix. They will need your VIN.
The cost for the upgrade is $275. Customers receive an electronic invoice when WranglerFix receives the unit.
Turnaround time was 5 days from California to Florida and back.
What the performance tune does:
This is not a “race tune.” Shift points and other parameters have been altered to increase performance and efficiency, but this will not turn your I-6 into a V-8. The best way to describe what the tune does is make the 42RLE automatic transmission with 0.69:1 4th gear/overdrive play nicely with the 4.0 engine. It does that job well.
I have not driven with it enough to record rpms at the shift points, etc., but that will come. My goal so far has been first impressions and observations regarding drivability. In that regard, I can say that my LJ now shifts the way it should have from the factory and I can make more rpm with less throttle.
After reinstalling my WranglerFix ECU with performance tune, the number of times I have reached for the OD “off” button is zero. Before, I couldn’t go anywhere without being reminded by sluggish performance of the need to keep OD from engaging. That alone makes the price of the upgrade worthwhile.
Stay tuned.