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Nag 1 Trans Problems

Running a built Nag 1, My problem is that under WOT when it shifts into 4thgear it automatically downshifts back into 3rd. Just wondering if anyone else had that problem. I have the right parts from the right people, just something that we're over looking. Let me know what you think.

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My buddy had a problem exactly like that. Ended up being the aftermarket TCM module/tune that was set up on the car.



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That's my next move.

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