the outer or inner ring 52 or 50 respectively the resilient coupling 54 maintains the concentric positioning of the outer ring 52 relative to the inner ring 50 the resilient coupling 54 may include a plurality of compression springs or may be an elastomeric material as is shown in the example provided one or more actuators 56 are disposed between the inner and outer rings 50 and 52 and in contact with the mutually opposed faces 60 a and 62 a of the lugs 60 and 62 respectively the actuators 56 may use any appropriate means to extend and retract between the faces 60 a and 62 a but in the particular embodiment provided the actuators includes a magnetostrictive member whose length may be changed by varying the magnitude of an electrical charge that is applied to it the controller 58 is electrically coupled to the actuators 56 and is operable for selectively controlling the charge that is applied to the magnetostrictive member during the operation of the propshaft assembly 10 the spring rate of the resilient coupling permits the outer ring 52 to damp vibrations within a predetermined frequency band the controller 58 however may be employed to extend or retract the actuators 56 to change the tangentially applied load on the resilient coupling 54 to thereby affect the spring rate of the resilient coupling 54 those skilled in the art will appreciate that the actuators 56 may be controlled so as to cancel out torsional vibrations entering the axle assembly 24 more.