Hydrodynamic converter comprising a turbine wheel and a locking clutch, said hydrodynamic converter comprising: - a torsion damping device between a motor shaft and a driven shaft that are coaxial of axial orientation, the device comprising: - a torque input element and a torque output element ; - at least one first upstream elastic member with circumferential action whose upstream circumferential end face is capable of being stressed by the input element or of stressing it; - at least one second downstream elastic member with circumferential action whose downstream circumferential end face is capable of stressing or being stressed by the output element ; - at least one first radial phase washer , the downstream end face of each upstream elastic member being capable of stressing or being stressed by an upstream phasing radial face of the phase washer , and the upstream end face of each downstream elastic member being capable of being stressed by a downstream phasing radial face of the phase washer or of stressing it so that the two elastic members are mounted in series; each elastic member being received circumferentially between the associated phasing face and an associated holding radial face facing the phase washer , the circumferential distance (D) between a phasing face and the facing holding face being at most equal to the circumferential length of the elastic member at rest said device characterized in that : - each phase washer is linked in rotation with the turbine wheel while the input element is linked in rotation with the locking clutch. - a torsion damping device between a motor shaft and a driven shaft that are coaxial of axial orientation, the device comprising: - a torque input element and a torque output element ; - at least one first upstream elastic member with circumferential action whose upstream circumferential end face is capable of being stressed by the input element or of stressing it; - at least one second downstream elastic member with circumferential action whose downstream circumferential end face is capable of stressing or being stressed by the output element ; - at least one first radial phase washer , the downstream end face of each upstream elastic member being capable of stressing or being stressed by an upstream phasing radial face of the phase washer , and the upstream end face of each downstream elastic member being capable of being stressed by a downstream phasing radial face of the phase washer or of stressing it so that the two elastic members are mounted in series; - a torque input element and a torque output element ; - at least one first upstream elastic member with circumferential action whose upstream circumferential end face is capable of being stressed by the input element or of stressing it; - at least one second downstream elastic member with circumferential action whose downstream circumferential end face is capable of stressing or being stressed by the output element ; - at least one first radial phase washer , the downstream end face of each upstream elastic member being capable of stressing or being stressed by an upstream phasing radial face of the phase washer , and the upstream end face of each downstream elastic member being capable of being stressed by a downstream phasing radial face of the phase washer or of stressing it so that the two elastic members are mounted in series; - each phase washer is linked in rotation with the turbine wheel while the input element is linked in rotation with the locking clutch. <EOS>