Fluid Pump
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
This transmission has a gear-type pump that supplies transmission fluid under pressure to the hydraulic system.
The torque converter impeller hub rotates the drive gear of the pump.