Abstract: Viscous resistance generation mechanism (71) is a device that dampens torsional vibrations using the restricted flow of a viscous fluid. The mechanism is installed in a flywheel assembly having a first flywheel and a second flywheel coupled to allow for limited relative rotary displacement. The viscous resistance generation mechanism (71) is equipped with a first choke (S1) that generates a resistive force through the passage of a viscous fluid between small chambers formed on either side of the choke (S1) in response to rotary displacement between the flywheels in a first angular displacement range. A second choke (S2) produces a resistive force in a second displacement range greater than the first displacement range, the resistive force of the second choke (S2) being larger than the resistive force produced by the first choke (S1).