Does anyone have an idea where the transmission speed sensor is located and how to replace it, any ideas will be most welcome

The vehicle determines it's speed from the wheel speed sensors in the ABS system. I don't believe there is a transmission speed sensor.

ANY ideas what to do because I can't seem to find a replacement for a wheel speed sensor or if I am even looking for the right part, because it all started since one of the rear wheel rims were bent and had to be straightened back, pls any suggestions on what to do