An overrunning coupling and control assembly comprising: first and second coupling members (12, 34) including first and second coupling faces respectively, in close-spaced opposition with one another, at least one of the members being mounted for rotation about an axis; a control element mounted for controlled rotational movement between the coupling faces about the axis; an actuator including an actuator housing having an outer surface, an inner surface which defines a bore within the housing and a control port which extends between and fluidly communicates the inner and outer surfaces of the housing to transmit a control pressure signal into the housing wherein the first coupling member and the housing are formed as a unitary component having a common wall separating and shared by the first coupling member and the housing an actuator arm coupled to the control element, the actuator arm moving the control element from a first position which corresponds to a first mode of the assembly to a second position which corresponds to a second mode of the assembly and back to the first position; an actuator piston disposed within the bore of the housing and having an outer surface in sliding contact with the inner surface of the housing; and a biasing member disposed within the bore of the housing to exert a biasing force on the piston, the control pressure signal within the housing causing the piston to slide within the bore against the biasing force of the biasing member to move the actuator arm and, in the absence of the control pressure signal, the biasing member moves the piston and, consequently, the actuator arm, being characterised in that the assembly further comprises: the wall has an elongated slot which extends between and fluidly communicates the inner surface of the housing and an inner surface of the first coupling member wherein the housing maintains the control pressure signal within the housing; the actuator arm rotates the control element about the axis along a direction substantially parallel to a direction in which the slot is elongated; and a groove is formed in the outer surface of the piston to receive and retain a free end portion of the actuator arm therein so that the actuator arm rotationally moves the control element about the axis when the piston axially moves in a direction substantially parallel to the axis. first and second coupling members (12, 34) including first and second coupling faces respectively, in close-spaced opposition with one another, at least one of the members being mounted for rotation about an axis; a control element mounted for controlled rotational movement between the coupling faces about the axis; an actuator including an actuator housing having an outer surface, an inner surface which defines a bore within the housing and a control port which extends between and fluidly communicates the inner and outer surfaces of the housing to transmit a control pressure signal into the housing wherein the first coupling member and the housing are formed as a unitary component having a common wall separating and shared by the first coupling member and the housing an actuator arm coupled to the control element, the actuator arm moving the control element from a first position which corresponds to a first mode of the assembly to a second position which corresponds to a second mode of the assembly and back to the first position; an actuator piston disposed within the bore of the housing and having an outer surface in sliding contact with the inner surface of the housing; and a biasing member disposed within the bore of the housing to exert a biasing force on the piston, the control pressure signal within the housing causing the piston to slide within the bore against the biasing force of the biasing member to move the actuator arm and, in the absence of the control pressure signal, the biasing member moves the piston and, consequently, the actuator arm, being characterised in that the assembly further comprises: the wall has an elongated slot which extends between and fluidly communicates the inner surface of the housing and an inner surface of the first coupling member wherein the housing maintains the control pressure signal within the housing; the actuator arm rotates the control element about the axis along a direction substantially parallel to a direction in which the slot is elongated; and a groove is formed in the outer surface of the piston to receive and retain a free end portion of the actuator arm therein so that the actuator arm rotationally moves the control element about the axis when the piston axially moves in a direction substantially parallel to the axis. the wall has an elongated slot which extends between and fluidly communicates the inner surface of the housing and an inner surface of the first coupling member wherein the housing maintains the control pressure signal within the housing; the actuator arm rotates the control element about the axis along a direction substantially parallel to a direction in which the slot is elongated; and a groove is formed in the outer surface of the piston to receive and retain a free end portion of the actuator arm therein so that the actuator arm rotationally moves the control element about the axis when the piston axially moves in a direction substantially parallel to the axis.