Abstract: An apply piston for a torque-transmitting mechanism in a power transmission includes a first circumferential periphery and a second circumferential periphery radially inward of the first circumferential periphery and axially displaced therefrom. The apply piston has a generally radially-extending face between the two peripheries. The two peripheries and the radially-extending face cooperate with a transmission case to form a fluid-filled chamber that is selectively expandable to direct fluid force to the piston for engagement of the torque-transmitting mechanism.

Abstract: A transmission assembly in accordance with the invention includes a plurality of torque-transmitting mechanisms. A hub member of the assembly includes a radially extending wall, and a circumferentially extending wall formed integrally with the radially extending wall. The circumferentially extending wall includes a first plurality of internal splines, a second plurality of external splines spaced with the internal splines, and a cylindrical end portion at a distal end of the hub and terminating both the internal splines and the external splines to prevent failure in high speed operations. A plurality of clutch plates associated with one of the plurality of torque-transmitting mechanisms are splined to the external splines of the hub member, and a plurality of clutch plates associated with another one of the plurality of torque-transmitting mechanisms are splined to the internal splines of the hub member.

Abstract: A piston support housing for a transmission assembly includes a plurality of axially-extending finger portions engaging a plurality of spline portions formed in a corresponding transmission case, and a plurality of friction plates are assembled adjacent the piston support housing such that the finger portions extend circumjacent peripheral edges of the friction plates. The friction plates include a plurality of torque-transmitting spline portions disposed circumferentially intermediate the finger portions. The friction plates also include a plurality of recesses disposed with one adjacent each of the finger portions to preclude contact between the finger portions and the friction plates thereby preventing torque-transmission through the finger portions to the transmission case.

Abstract: An apply piston for a torque-transmitting mechanism in a power transmission includes a first circumferential periphery and a second circumferential periphery radially inward of the first circumferential periphery and axially displaced therefrom. The apply piston has a generally radially-extending face between the two peripheries. The two peripheries and the radially-extending face cooperate with a transmission case to form a fluid-filled chamber that is selectively expandable to direct fluid force to the piston for engagement of the torque-transmitting mechanism.

Abstract: A transmission assembly in accordance with the invention includes a plurality of torque-transmitting mechanisms. A hub member of the assembly includes a radially extending wall, and a circumferentially extending wall formed integrally with the radially extending wall. The circumferentially extending wall includes a first plurality of internal splines, a second plurality of external splines spaced with the internal splines, and a cylindrical end portion at a distal end of the hub and terminating both the internal splines and the external splines to prevent failure in high speed operations. A plurality of clutch plates associated with one of the plurality of torque-transmitting mechanisms are splined to the external splines of the hub member, and a plurality of clutch plates associated with another one of the plurality of torque-transmitting mechanisms are splined to the internal splines of the hub member.

Abstract: A piston support housing for a transmission assembly includes a plurality of axially-extending finger portions engaging a plurality of spline portions formed in a corresponding transmission case, and a plurality of friction plates are assembled adjacent the piston support housing such that the finger portions extend circumjacent peripheral edges of the friction plates. The friction plates include a plurality of torque-transmitting spline portions disposed circumferentially intermediate the finger portions. The friction plates also include a plurality of recesses disposed with one adjacent each of the finger portions to preclude contact between the finger portions and the friction plates thereby preventing torque-transmission through the finger portions to the transmission case.

Abstract: A retaining ring apparatus includes a C-ring and a groove within a shaft. The shaft groove has a tapered edge at one side thereof and the C-ring has at least one tapered surface, which is disposed in mating relationship with the tapered surface of the groove. The retaining ring apparatus is disposed within a larger structure, which has at least one mechanism for applying an axial force to the retaining ring to ensure the mating of the tapered surfaces.

Abstract: A retaining ring apparatus includes a C-ring and a groove within a shaft. The shaft groove has a tapered edge at one side thereof and the C-ring has at least one tapered surface, which is disposed in mating relationship with the tapered surface of the groove. The retaining ring apparatus is disposed within a larger structure, which has at least one mechanism for applying an axial force to the retaining ring to ensure the mating of the tapered surfaces.