2001 - 2004 GM 6.6L LB7 Duramax | Allison Transmission Tuning by PPEI.
2001 - 2004 GM 6.6L LB7 Duramax | Allison Transmission Tuning by PPEI.

2001 - 2004 GM 6.6L LB7 Duramax | Allison Transmission Tuning by PPEI


Enhance your driving experience and extend the lifespan of your Allison transmission with PPEI’s Transmission Tuning, specifically designed for the 2001 - 2004 LB7 Duramax. PPEI’s 5-Speed Allison transmission tuning is a game-changer for your LB7 Duramax, whether you seek optimal performance or overall reliability.

Key Features:

  • Adaptive Shift Strategy: Tailored to improve the overall performance of your LB7 Duramax’s Allison 5-speed transmission, our tuning adjusts shift points dynamically, ensuring a smoother and more responsive driving experience.
  • Refined Shift Points: Say goodbye to the low RPM "Lazy" feel. Our tuning eliminates the need for aggressive throttle inputs for downshifts, enhancing fuel efficiency and drivability, especially for trucks with larger tires and, most importantly, LB7 Duramax trucks equipped with aftermarket turbos.
  • Turbo Lag Reduction: Experience reduced turbo lag with optimized upshifts and downshifts, keeping your engine in the ideal RPM range for maximum efficiency and power delivery.
  • Torque Converter Lock-Up Refinement: Our transmission calibration fine-tunes the torque converter lock-up strategy, delivering power to the ground more efficiently. This not only boosts fuel economy but also reduces heat build-up in typical unlocked conditions.
  • Customizable to Your Needs: At PPEI, we understand that every driver is unique. If you have specific requirements or preferences for your transmission calibration, our team is ready to customize it to fit your driving style.

Enhanced Durability and Economy:

PPEI’s Allison 5-Speed Transmission Tuning is not just about performance; it's about longevity and efficiency. Fine-tuning the transmission’s operation helps extend the life of your transmission and improves your fuel economy. PPEI’s Transmission tuning is an essential upgrade for the LB7 Duramax trucks with additional horsepower and torque.

Whether you're driving around town or hauling heavy loads, PPEI's Transmission Tuning for the LB7 Duramax is the best and only transmission tune that unlocks the full potential of your truck. At PPEI, transmission tuning is a must for all vehicles, whether tuned or not. A properly tuned transmission will not only make for an enjoyable driving experience but will also extend the life of your truck’s transmission while allowing your truck to perform at its optimal ability.

Installation Compatibility:

Installing the PPEI Transmission Tuning is straightforward with the right tools. It's compatible with the following EFILive Hardware:

  • EFILive AutoCal V2/V3
  • EFILive FlashScan V2/V3

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Customer Reviews

Based on 4 reviews
Rodney Willard
Great Team!

These guys are the best! They helped get the tune for my 04 Duramax on point. Thank you so much!

Great tune

I have bought different tunes from PPEI and have been satisfied with their tunes and services, their techs are very helpful when I was having problems with downloading the tunes. I would very much recommend their tunes.


Excellent customer service!!!

Nicholas Sutter
Incredible Tech Support

I should have ordered the transmission tune when I purchased the truck, it is incredible. I upgraded the injectors, added a 4" exaust, and an air dog lift punp, but the transmission tune feels best. The truck goes and just keeps going, smooth as butter. But it wasn't easy, I am not very computer savvy and struggled to load the program. Tech Support walked me through it, and even when I couldn't follow directions they stayed calm and helped me get my truck running better than factory!


PPEI, also known as Power Performance Enterprises, Inc., is led by the business owner and lead calibrator/tuner Kory Willis. PPEI began calibrating/tuning back in 2008, specializing in Diesel Performance but has since expanded into the Gas and Powersports industries. Kory and the team at PPEI have set many world records along with continuing many industry “firsts”. We take pride in knowing that Kory not only prides his work, but also thoroughly enjoys setting expectations high for our team so our customers can have the best products available in the world.