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Uneducated observation but I experienced this (and still kinda working it out) when I accidentally set the trans adapt preset and reset the fast adapt learn via hp tuners. I managed to get 1, 2 and 3rd gear to shift correctly via the former option and doing WOT pulls. I reckon it's something to do with torque management in the TCM in your case but like I said, it's a uneducated observation.
Last edited by EasternPine; 03-26-2026 at 06:20 AM.
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