An electric machine module comprising: a housing at least partially defining a machine cavity; and an electric machine positioned substantially within the machine cavity and at least partially enclosed by the housing, the electric machine including a rotor assembly, including a rotor hub, the rotor assembly operatively coupled to an output shaft, the output shaft including at least one output shaft coolant channel and at least one output shaft coolant outlet in fluid communication with the output shaft coolant channel, the rotor assembly including at least one magnet, a first axial end, and a second axial end, the first axial end opposing the second axial end, the rotor assembly including a plurality of coolant channels extending from the first axial end to the second axial end, the plurality of coolant channels in fluid communication with the machine cavity, at least one rotor hub channel positioned through a portion of the rotor assembly, the at least one rotor hub channel comprising at least one passageway which extends from at least a portion of the at least one output shaft coolant outlet to at least a portion of the plurality of coolant channels, the rotor assembly including a plurality of rotor laminations, wherein the plurality of coolant channels is defined between an inner diameter of the rotor laminations and an outer diameter of the rotor hub, wherein the plurality of coolant channels is at least partially defined by recesses formed in the inner diameter of the rotor laminations, and wherein the recesses are arranged so that the coolant channels are in fluid communication with the machine cavity. a housing at least partially defining a machine cavity; and an electric machine positioned substantially within the machine cavity and at least partially enclosed by the housing, the electric machine including a rotor assembly, including a rotor hub, the rotor assembly operatively coupled to an output shaft, the output shaft including at least one output shaft coolant channel and at least one output shaft coolant outlet in fluid communication with the output shaft coolant channel, the rotor assembly including at least one magnet, a first axial end, and a second axial end, the first axial end opposing the second axial end, the rotor assembly including a plurality of coolant channels extending from the first axial end to the second axial end, the plurality of coolant channels in fluid communication with the machine cavity, at least one rotor hub channel positioned through a portion of the rotor assembly, the at least one rotor hub channel comprising at least one passageway which extends from at least a portion of the at least one output shaft coolant outlet to at least a portion of the plurality of coolant channels, the rotor assembly including a plurality of rotor laminations, wherein the plurality of coolant channels is defined between an inner diameter of the rotor laminations and an outer diameter of the rotor hub, wherein the plurality of coolant channels is at least partially defined by recesses formed in the inner diameter of the rotor laminations, and wherein the recesses are arranged so that the coolant channels are in fluid communication with the machine cavity. the rotor assembly operatively coupled to an output shaft, the output shaft including at least one output shaft coolant channel and at least one output shaft coolant outlet in fluid communication with the output shaft coolant channel, the rotor assembly including at least one magnet, a first axial end, and a second axial end, the first axial end opposing the second axial end, the rotor assembly including a plurality of coolant channels extending from the first axial end to the second axial end, the plurality of coolant channels in fluid communication with the machine cavity, at least one rotor hub channel positioned through a portion of the rotor assembly, the at least one rotor hub channel comprising at least one passageway which extends from at least a portion of the at least one output shaft coolant outlet to at least a portion of the plurality of coolant channels, the rotor assembly including a plurality of rotor laminations, wherein the plurality of coolant channels is defined between an inner diameter of the rotor laminations and an outer diameter of the rotor hub, wherein the plurality of coolant channels is at least partially defined by recesses formed in the inner diameter of the rotor laminations, and wherein the recesses are arranged so that the coolant channels are in fluid communication with the machine cavity.