A torque converter for a vehicle includes an impeller, a turbine, a stator positioned between the impeller and the turbine, a one-way clutch coupled to the stator and configured to couple to a fixed member, and a controllable clutch assembly. The controllable clutch assembly is configured to selectively engage the stator and the turbine such that the stator is able to rotate with the turbine to facilitate preventing the stator from reacting against the one-way clutch and applying a load to the fixed member and thereby facilitating reducing an output of the torque converter and reducing engine vibration during idle, and disengage the stator from the turbine to enable relative rotation between the stator and turbine.