Anyone knows whether diagnostics monitor if the transmission is changed?
Or rebuilt?

If your asking if the car knows it has a new or rebuilt box then no it doesn't, you can reset the adaptations on the gearbox ECU if you fit a new or rebuilt box and it will relearn it's parameters.

Personally I wouldn't reset them, it will take a little longer to learn it's new place in life but it is not such a shock to it....  Pete
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Haylands thanks for info.
I meant if we could see the history by diag tools.

No, it's not that clever....  Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-