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Duramax LLY, Bad Defueling on shifts

Practical Diesel Tuning

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Discussion and questions related to the course Practical Diesel Tuning

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i tried to copy Nicks tune in the LLY tuning course for testing.

but now the truck defuels really bad on shifts, what did i do wrong? all the torqe tables look the same as in Nicks guide but i did it in Nm instead of LB FT but i increased the values by the same % as in the guide


Can you post your tune file and a log so I can verify? Does your truck have a stock transmission or modified?

Also, keep in mind the truck will have to learn the shift quality. The first test drive the allison doesn't know what to expect and will be surprised by the additional torque.

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