Hydrokinetic torque coupling device having turbine-piston lockup clutch, and related methods

A method of assembling a hydrokinetic torque coupling device for coupling a driving shaft and a driven shaft together, comprising:

• providing a torque converter having a rotational axis, the torque converter comprising an impeller and an axially movable turbine-piston, the impeller comprising an impeller shell, the turbine-piston comprising a turbine-piston shell including a turbine-piston flange;
• and
• operatively connecting the torque converter with a piston engagement member having a first engagement surface and a casing shell to provide a structure comprising (i) a casing of the hydrokinetic torque coupling device, the casing shell and the impeller shell respectively defining opposite first and second sidewalls of the casing, the casing comprising an outer wall interconnecting the first and second sidewalls, (ii) the piston engagement member extending substantially radially inward from and non-movable relative to the outer wall of the casing, and spaced between the opposite first and second sidewalls of the casing, and (iii) the turbine-piston flange with a second engagement surface movable axially toward and away from the first engagement surface of the piston engagement member to position the hydrokinetic torque coupling device into and out of a lockup mode in which the turbine-piston is mechanically locked to and non-rotatable relative to the piston engagement member.