The pump is linked to the engine, and it pumps fluid (standard oil) into your torque converter. The turbine is connected to the gearbox, and it spins in the event the fluid from your pump hits it. The filters prevent these contaminants from moving into the transmission and wreaking havoc. https://filtergearbox90875.blogoscience.com/40369286/5-tips-about-filter-gearbox-you-can-use-today