Apparatus for managing fluid flow in a vehicle, comprising: an epicyclic gear set having first and second inputs configured to receive rotational drive input from a torque output feature of a powertrain and a rotary actuator (120; 220) respectively; a pump driver for driving a fluid pump, the pump driver configured to receive rotational drive input from an output of the epicyclic gear set; and characterized by a controller configured to determine information corresponding to the rotational speed of the torque output feature using information generated by a rotational speed sensor and based on this control the rotary actuator (120; 220) such that the pump driver is caused to rotate at substantially a pre-specified speed so as to maintain a pre-specified flow rate of transmission fluid across a range of vehicle travelling speeds, wherein the torque output feature is rotationally fixed to a transmission output shaft and the information corresponding to the rotational speed of the torque output feature is indicative of the rotational speed of the transmission output shaft, or wherein the torque output feature is rotationally fixed to a differential cross-shaft and the information corresponding to the rotational speed of the torque output feature is indicative of the rotational speed of the differential cross-shaft, and wherein the controller is configured to compare the rotational speed of the transmission output shaft or differential cross-shaft with a lookup table associating different values thereof with respective entries of information indicative of how the rotary actuator (120, 220) should be controlled in order for the pump driver to rotate at substantially the pre-specified speed. an epicyclic gear set having first and second inputs configured to receive rotational drive input from a torque output feature of a powertrain and a rotary actuator (120; 220) respectively; a pump driver for driving a fluid pump, the pump driver configured to receive rotational drive input from an output of the epicyclic gear set; and characterized by a controller configured to determine information corresponding to the rotational speed of the torque output feature using information generated by a rotational speed sensor and based on this control the rotary actuator (120; 220) such that the pump driver is caused to rotate at substantially a pre-specified speed so as to maintain a pre-specified flow rate of transmission fluid across a range of vehicle travelling speeds, wherein the torque output feature is rotationally fixed to a transmission output shaft and the information corresponding to the rotational speed of the torque output feature is indicative of the rotational speed of the transmission output shaft, or wherein the torque output feature is rotationally fixed to a differential cross-shaft and the information corresponding to the rotational speed of the torque output feature is indicative of the rotational speed of the differential cross-shaft, and wherein the controller is configured to compare the rotational speed of the transmission output shaft or differential cross-shaft with a lookup table associating different values thereof with respective entries of information indicative of how the rotary actuator (120, 220) should be controlled in order for the pump driver to rotate at substantially the pre-specified speed.