To obtain the transmission into overdrive, many points have to be related and disconnected by clutches and bands. The planet provider receives connected to the torque converter housing by a clutch. The little Solar will get disconnected through the turbine by a clutch to make sure that it can freewheel. https://juliusfwkxk.bcbloggers.com/32975099/the-best-side-of-gearbox-auto