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It fixed a DCT issue I understand (that was one way of people getting it done under warranty)...but the power gains are felt by all transmissions.
edit: assuming there are actual gains. Some speculate the reflash causes resetting of parameters that yield higher horsepower. If you go away for a couple weeks and drive after the car has learned stuff, then come back to dyno; no one believes the dyno's are accurate comparisons.
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