Abstract: An apparatus for removing used transmission fluid from an automatic transmission of a motor vehicle wherein a cylindrical reservoir having a rotating wand therein for dividing the reservoir into two chambers, said first chamber being connected to the transmission fluid outlet of the transmission and said second chamber being connected to the fluid input of a transmission fluid cooler wherein the second chamber is initially filled with fresh fluid forcing the wand toward the first chamber and wherein the fluid exiting the transmission due to the pump in the transmission fills the first chamber and forces the wand to rotate to expel fresh fluid form the second chamber into the cooler and the transmission.