01–10 Duramax TCM Tuning
AL5, A40, A50, and T87.
Our 01–10 Duramax TCM tuning is built to improve how your truck drives and how the transmission performs under power. Whether you’re daily driving, drag racing, or sled pulling, these calibrations are designed to make your shifts more consistent, more controlled, and better matched to your setup.
What It Does
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Raised shift points to keep the truck in the powerband
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Improved shift strategies for better overall drivability and performance
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More consistent shift scheduling under throttle
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Optional gear start changes for racers and pullers
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Different launch/starting gear options based on drag racing or sled pulling
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11–16 Trucks (Line Pressure Option)
For 11–16 Duramax trucks, we can also add increased line pressure for improved clutch apply and shift firmness.
Requirements:
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Transmission must be stock
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No EPC fooler installed
If you later build the transmission, reach out to us for a revision and we will remove the increased line pressure if needed.
Readout / File Requirements
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01–05 trucks: No factory readout required
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06+ trucks: Please email your stock tune file to tuning@delaneysdiesel.com or upload it above.
Please allow 2–3 business days for tune delivery.
