How does the BMW X7's automatic transmission work?

I am thinking of buying a BMW X7 and I am curious about how the automatic transmission works. Can you explain it to me?

The BMW X7's automatic transmission is a modern 8-speed Steptronic gearbox that provides smooth and efficient shifts. It uses a torque converter to transmit power from the engine to the wheels. Simply put, it is similar to the traditional automatic transmissions but with more advanced technology.

As a mechanic who has worked on many BMWs, I can tell you that the X7's automatic transmission is reliable and requires minimal maintenance. It is also equipped with a sport mode and paddle shifters for a more engaging driving experience.