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 f