Okay, so I have disconnected transmission on running engine. It went into protection mode but gearbox is behaving the same. Nothing in reverse and driving forward in neutral. So it is probably shot.

I am still unable to connect to ECM. It will detect it and show its details but I cannot read DTCs or look at live data. Always getting no response error.

Other modules like TCM or airbag are reading okay.
I am using Launch 431 scanner.

Any ideas on that?
Thanks