2017 - 2023 GM 6.6L L5P Duramax | Transmission Tuning by PPEI
2017 - 2023 GM 6.6L L5P Duramax | Transmission Tuning by PPEI

2017 - 2023 GM 6.6L L5P Duramax | Transmission Tuning by PPEI

PP-17-23-L5P-TT

Extend 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.

This tuning package can be installed using an PPEI RTD, HPTuners MPVI2/3.

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Customer Reviews

Based on 44 reviews
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J
Jeremy Thomas
Great Tuning. Helpful Service. Easy processs

Tunes really solidified my transmission shifts. Staff was very helpful. Overall process was super easy.

S
Suprsyn
Exceeded Expectations!

Background: 2020 L5P, GDP ECM tune & 5inch full exhaust. 35inch tires. Tune level 4 for Daily driving & Level 1 for towing.

It’s been 3k miles since I have flashed TCM Tuning by PPEI and I love it!
Instantly , you’ll noticed shift points changed for the better. I drove normally for about 1k miles so the TCM adaptive learning to could learn my style of driving. Once 1k miles break in was completed, I did do a couple of 75-100% throttle pulls and it is night and day from stock. (Break-in not required by PPEI, but personal preference).
During towing, I did enjoying the higher shift points while driving through the mountains. I did notice downshifting happens more quicker. At times, if the transmission temp is under 100F, there is a slight weird shift between 2-3, like a clutch slip feeling. Happens at 10-25% throttle but won’t do it again once the transmission is warmed up. Overall, I am happy with the end results.

w
wesley

Great customer service

D
Dylan Dunnehoo
Worth it for sure!

Overall very pleased with the performance on a 23 T/D L5P. The trans acts like it knows what to do now and quicker firmer shifts when you have your foot in it. Hopefully this will extend the life of the terrible 10L1000. The instructions were fairly easy to follow as well.

I
Irving
2018 Duramax

My truck shift really smooth after TCM tuning from PPEI. I had a dozen questions and the team really helped with everything I needed. The tune process was easy and the installation of the TCM too. Special thanks to Logan and Mallory

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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.