The pump is connected to the motor, and it pumps fluid (usual oil) in the torque converter. The turbine is connected to the gearbox, and it spins if the fluid in the pump hits it. The transmission has some fluid that helps it run easily and efficiently. The filter is https://trevorlonki.blogitright.com/34223054/the-smart-trick-of-filter-gearbox-that-no-one-is-discussing