Abstract: A torque transmission device of a motor vehicle which transmits torque from an internal combustion engine to a torque converter, wherein the torque transmission device includes transmission part connected to the torque converter in a first radius region having a quantity of fastening elements lying on a first radius and connected to the internal combustion engine in a second radius region having a quantity of fastening elements lying on a second radius. To reduce loading of the fastening elements, the transmission part is provided with recesses in the first radius region and/or in the second radius region that extend at least partially over the first or second radius region and lessen the axial rigidity of the transmission part.

Abstract: A torque transmission device of a motor vehicle which transmits torque from an internal combustion engine to a torque converter, wherein the torque transmission device includes transmission part connected to the torque converter in a first radius region having a quantity of fastening elements lying on a first radius and connected to the internal combustion engine in a second radius region having a quantity of fastening elements lying on a second radius. To reduce loading of the fastening elements, the transmission part is provided with recesses in the first radius region and/or in the second radius region that extend at least partially over the first or second radius region and lessen the axial rigidity of the transmission part.

Abstract: An impeller wheel is connected to a housing cover on the drive side so as to be fixed with respect to rotation relative to it. The housing cover has a cover hub. At least one clutch plate of a lockup clutch is coupled to a plate driver and is arranged between the housing cover and a piston which is displaceable axially between an engaged position and a disengaged position. In the engaged position, the clutch plate is coupled with the impeller wheel so as to be fixed with respect to rotation relative to it and in the disengaged position the clutch plate is supported so as to be rotatable relative to the impeller wheel. The piston is supported on the cover hub and is connected to a driver disk so as to be fixed with respect to rotation relative to it, this driver disk being connected to the cover hub so as to be fixed with respect to rotation relative to it. The piston is supported in axial direction at the cover hub in the disengaged position.