Modern transmissions are not as simple as they used to be. We can say that transmissions have become smart with the introduction of AI machine learning algorithms
Current measurement is best done by clamping the conductor carrying the current instead of having an ameter in series. This method is good for measuring parasitic battery drain.
Where there is no way to fix an overheating car on the spot, these are information needed to be able to drive an overheating car to a workshop or safe place.