Hey guys, so I finally got this fixed...

It was the transmission as I started to suspect!

The past weekend I spent 1.5 days swapping it with a buddy. Overall it wasn't too bad if you've ever swapped a trans before. I did also swap the internal trans ECU to avoid having to re-code the new one. Then of course reset adaptations and drive it slowly for the first 100 miles.

The car drives like brand new, very smooth and predictable.

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