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PPEI Tuning

4.5 (123)

2017 - 2026 GM 6.6L L5P Duramax | Transmission Tuning by PPEI

Name: PPEI Tuning 2017 - 2026 GM 6.6L L5P Duramax | Transmission Tuning by PPEI - 2017 - 2026 GM 6.6L L5P Duramax | Transmission Tuning by PPEI
Brand: PPEI Tuning
SKU: 42187647680669
Price: 474.36 USD
Availability: InStock
Rating: 4.9718 (65 reviews)

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$474.36

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Color

Black

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Description

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 a...

Reviews

5.0

71 ratings

2020 L5P Duramax

The tunes are flawless! Truck holds shifts as it should from GM and is much smoother! Thanks PPEI TEAM for always having the best tunes money can buy

Dustin · May 12, 2026

Trans tuning

Process was fast and easy, the trucks shifts really good now and holds the gears a lot better.

sean · 13 days ago

24+ tcm tune

Can’t be happier with the tcm tune. This whole process with PPEI was so amazing they are fast super professional. Tune came in super quick loaded it up. Currently had tcm tune but the PPEI is far superior for tcm tuning. Love how it shifts couldn’t be happier with this choice money well spent

Justin · April 24, 2026