Torque

Hello I have recently read the following couplings to be plucked on the Internet: The rupee excitation of a coupling increases with the transferable torque. I don’t understand what is meant by the term “transferable torque”. I know, however, that torque is a rotating force; so here around the axis rotating parts in the coupling Is this transferable torque a fixed size that is always the same with each passenger car? Or can the transferable torque in a passenger car change If the motor is turned at higher speed, is the transferable torque higher or always the same?