A transmission is provided including a sump at least partially defining a sump volume and operable to contain a fluid. The transmission further includes a hydraulic pump. An inlet tube is disposed at least partially within the fluid and is operable to communicate the fluid from the sump volume to the hydraulic pump. A fluid displacement reservoir defining a reservoir volume and disposed at least partially within the sump volume is also provided. The fluid displacement reservoir is operable to selectively displace or impede the movement of at least a portion of the fluid when the fluid within the transmission is subject to acceleration, such that the amount of the fluid required within the sump volume to maintain the inlet tube disposed within the fluid is reduced. The fluid displacement reservoir is also operable to selectively contain or receive at least a portion of the fluid.