So might be similar issue to what I experienced yesterday.
Full acceleration from stop light. It shifted to second normally, then didn't shift into third and just bounced on rev limiter. I let off and after a few seconds, shifted into third.
Now I've noticed it basically has no power. It feels like a normal V6. I checked all hoses and all okay. It even has to change gear on interstate when going up minor hills, it has never done that. The awesome agressive acceleration is gone, regardless of mode. It is very sluggish and just doesn't want to go.
I have noticed that it always had a sound like a whipple supercharger, turbo whine, that is now gone. Completely stock, 2021 with 2800 miles. No dash warning lights.
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