A transmission for a hybrid vehicle including a combustion engine and an electric propulsion system may include a forward clutch assembly, a fluid chamber, a fluid supply, and a forward clutch holding valve. The forward clutch assembly may include a hydraulically actuated clutch member in communication with the fluid chamber. The forward clutch holding valve may be in communication with the fluidchamber and the fluid supply. The valve may provide communication between the fluid supply and the fluid chamber when in a first position and may seal the fluid chamber when in a second position, thereby maintaining a fixed quantity of fluid within the fluid chamber.