To have the transmission into overdrive, plenty of things have to be related and disconnected by clutches and bands. The World provider gets linked to the torque converter housing by a clutch. The smaller Solar will get disconnected from your turbine by a clutch in order that it could freewheel. https://gearbox-auto53085.elbloglibre.com/33762943/getting-my-gearbox-auto-to-work