An AOD is not electronically controlled so there is no computer. That speed sensor is a pulse generator for an electronic speedometer. if i'm right unbolt it and keep it for now, this is where your speedometer cable is bolted into. AOD's use a TV cable which must be adjusted correctly or the
trans is dead in a few miles of driving. TV means throttle valve and dictates pump pressures and such which the
trans needs to know to avoid slipping and burning up clutches. Go to
Baumannengineering.com and read up on this, I have used 4 of their computers on 4 cars my brothers and I have built with no trouble at all, it is a very educational site and will answer many of your questions far better than I can, good luck