A transmission (118, 200) for a powered vehicle, comprising: a housing defining an interior (334, 434) of the transmission (118, 200); a fluid supply (310, 410) disposed in the housing, the fluid supply (310, 410) configured to supply fluid throughout the transmission (118, 200); a first fluid circuit disposed within the housing, the first fluid circuit defining a first fluid path in fluid communication with the fluid supply (310, 410); a second fluid circuit fluidly defining a second fluid path in fluid communication with the fluid supply (310, 410); a coupling mechanism (206, 324, 424) for fluidly coupling the first fluid circuit and second fluid circuit; and wherein, the second fluid circuit is disposed outside the housing of the transmission (118, 200); characterized in that: the transmission further comprises a lube regulator valve (326, 426) disposed in the housing and being in fluid communication with the first and second fluid circuits, the lube regulator valve (326, 426) configured to regulate lube pressure in the transmission (118, 200), and wherein the coupling mechanism (206, 324, 424) is fluidly coupled to the lube regulator valve (326, 426) such that, in use, the coupling mechanism (206, 324, 424) provides fluid from the second fluid path to the lube regulator valve (326, 426) for circulation along the first fluid path. a housing defining an interior (334, 434) of the transmission (118, 200); a fluid supply (310, 410) disposed in the housing, the fluid supply (310, 410) configured to supply fluid throughout the transmission (118, 200); a first fluid circuit disposed within the housing, the first fluid circuit defining a first fluid path in fluid communication with the fluid supply (310, 410); a second fluid circuit fluidly defining a second fluid path in fluid communication with the fluid supply (310, 410); a coupling mechanism (206, 324, 424) for fluidly coupling the first fluid circuit and second fluid circuit; and wherein, the second fluid circuit is disposed outside the housing of the transmission (118, 200); characterized in that: the transmission further comprises a lube regulator valve (326, 426) disposed in the housing and being in fluid communication with the first and second fluid circuits, the lube regulator valve (326, 426) configured to regulate lube pressure in the transmission (118, 200), and wherein the coupling mechanism (206, 324, 424) is fluidly coupled to the lube regulator valve (326, 426) such that, in use, the coupling mechanism (206, 324, 424) provides fluid from the second fluid path to the lube regulator valve (326, 426) for circulation along the first fluid path. the transmission further comprises a lube regulator valve (326, 426) disposed in the housing and being in fluid communication with the first and second fluid circuits, the lube regulator valve (326, 426) configured to regulate lube pressure in the transmission (118, 200), and wherein the coupling mechanism (206, 324, 424) is fluidly coupled to the lube regulator valve (326, 426) such that, in use, the coupling mechanism (206, 324, 424) provides fluid from the second fluid path to the lube regulator valve (326, 426) for circulation along the first fluid path.