2017 - 2025 GM 6.6L L5P Duramax | Transmission Tuning by PPEI
PP-17-23-L5P-TTExtend your L5P Duramax's transmission's life and increase your fuel economy with PPEI's T87A/T93 Transmission tuning! A MUST for tuned trucks with additional torque.
PPEI was the first to offer transmission tuning for these new allisons and we have not let off the throttle since!
The refined shift points get rid of the low rpm “Lazy” feel these trucks have that force the driver to stab the throttle for a downshift – not cool and a fuel economy killer! For vehicles with larger turbochargers, ppei transmission tuning is a must to get the engine back into a rpm range to match the torque curve of the new turbo.
Along with the improved shift points, PPEI also refines the torque converter lockup strategy to put the power to the ground much more efficiently for improved fuel economy by eliminated unnecessary slip in the torque converter – which also drives down heat in typical “unlocked” conditions.
Lastly (and possibly the greatest benefit) is the increase in line pressure ppei provides. line pressure increases the holding capacity in the transmission by clamping the clutch packs together with more force – this allows tuned trucks (or trucks towing heavy) to have the confidence they need to enjoy their truck for years to come.
**2024 & 2025 Trucks**
HP Tuners supports Global B TCMs with Serv#: 24043414, 24043412, and 24294753. You need to buy one of those to even consider tuning the 24/25 model with the currently locked Global B TCM.
- Install HPTuners unlocked TCM (service numbers above) into the truck.
- Flash the proper file for your vehicle into it. (This may require disconnecting/reconnecting batteries if it needs power cycle).
- Perform serial data authentication with MDI (dealer tool). Follow the procedure.
- Do MCVM reset after that. Follow the procedure.
This tuning package can be installed using an PPEI HPTuners MPVI2/3/4, RTD4 or EZ LYNK AutoAgent 3.
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WHO IS THE TUNER/CALIBRATOR
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.