The key on every time function does not reflash the ECM with a tune. It just loads a tune already flashed to the ECM, if that makes sense.
You can reflash the ECM without going back to stock - Reload your custom tune, and it will overwrite what is on the ECM.
Save that extra step of going back to stock.
Even if you quickly learn, as soon as you reload your tune, it resets the CVI values.
When I had my new trans installed, the dealer did the quick learn, but I reloaded my tunes and did my own transmission relearn.
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