the present invention provides a clutch having two pistons , a first piston defining a first , smaller area and a second piston , defining a second , larger area . the separate pistons are independently provided with flows of pressurized hydraulic fluid from first and second independent modulatable control valves . engagement of the clutch may be rapid by providing hydraulic fluid to the smaller area piston , provide greater engagement force by providing hydraulic fluid to the larger area piston or a combination of speed and force by utilizing modulated or unmodulated flows of hydraulic fluid to both pistons .