Patent ID: 8123014

Claim:
An assembly for selectively engaging a first torque transmitting mechanism and a second torque transmitting mechanism, the assembly comprising: a piston member having a first side with a first side contact surface and a second side opposite the first side, the second side having a second side contact surface, wherein the first side contact surface is disposed proximate the first torque transmitting mechanism and the second side contact surface is disposed proximate the second torque transmitting mechanism, and wherein the piston member includes a plurality of tab members wherein the first and second side contact surfaces are disposed at opposite ends of the plurality of tab members; a second member disposed proximate the piston member, wherein the second member and the piston member cooperate to define a first fluid chamber; a backing member sealed to the piston member, wherein the backing member and the piston member cooperate to define a second fluid chamber; a first biasing member disposed within the first fluid chamber; and a second biasing member disposed within the second fluid chamber, and wherein the first torque transmitting device is engaged when a pressure produced by a hydraulic fluid in the first fluid chamber creates a force on the piston member that exceeds a force exerted by the second biasing member and wherein the second torque transmitting device is engaged when a pressure produced by a hydraulic fluid in the second fluid chamber creates a force on the piston member that exceeds a force exerted by the first biasing member.