Abstract: A hydrodynamic converter coupling member for a torque converter has a simplified structure that can include plastic materials and permit a reduction in components with simplified assembly processes which may result in lighter components and reduced assembly costs. For a turbine, the coupling is made with an outer shell and a plurality of channel inserts. The inserts form the curved channels or fluid passages of the turbine and include generally concentric curved inner and outer sides integrally connected to one another along one edge by a connecting wall that acts as a blade or vane. The inserts are secured in the outer shell with their outer sides against the outer shell. The inner sides are supported at both edges by the connecting walls, which are integral with one edge and include grooves for receiving the opposite free edges. Thus, the inner sides close the channels inwardly and avoid the need for a separate inner shell in the improved assembly.