Unlock the full potential of your 2017–2025 Duramax with our L5P Transmission Tuning for HP. Designed to improve drivability, reliability, and performance, this tuning requires an unlocked TCM module and 4 HP credits. A stock read must be performed after swapping TCMs in order to write the tune file.
Our transmission tuning delivers noticeable improvements where it matters most:
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Modified Shift Speeds – Adjusts RPM and speed-based shift points for optimal performance.
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Modified Shift Timing – Refines the time it takes to complete a shift for smoother, faster transitions.
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Improved TCC Lockup Strategy – Maximizes efficiency and reduces slip under load.
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Increased Line Pressure – Provides stronger, more consistent shifts under heavy power.
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Enhanced Torque Management – Better control during shifts and in-gear driving.
We also offer custom-tailored trans tuning adjustments to match your driving style, towing needs, or performance goals. Whether you’re after smoother daily driving or maximum power handling, our L5P Transmission Tuning gives you the control and durability your truck deserves.
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