Abstract: A selectable one-way clutch assembly for use in an automatic transmission comprises a strut plate rotatable about a central hub and having pockets and struts mounted therein for pivotable rotation. A selecting plate concentrically located about an activator hub has teeth extending axially inboard and configured to fit in the apertures in an activator plate. A turning device is selectively operable to activate one-way clutching mode by rotating the pin of a control plate to disengage selecting cams and displace selecting plate teeth inboard beyond the inboard face of the activator plate wherein the struts catch the teeth when the strut plate assembly is rotated in a clutching direction. The catching ends of the struts are cammed in the pockets by ramped camming ends of the teeth when the strut plate assembly is rotated in the opposing direction, thereby allowing freewheeling of the strut plate in the overrun direction.

Abstract: A torque transmitting device has a plurality of friction discs alternately splined to a housing and a hub. A fluid operated piston is slidably disposed in the housing and is fluid actuated to enforce frictional engagement between the friction discs and establish a torque transmitting interface between the housing and the hub. A one-way device is disposed in the housing at a location axially spaced from the piston. The one-way device has one member splined to the housing and another member splined to the hub. A plurality of actuating elements are disposed between the one-way members to enforce axial separation thereof upon a speed differential between the one-way members in one direction. The axial separation causes engagement of the friction discs to halt the speed differential and provide a one-way torque transmitting apparatus independent of the piston.