The present disclosure is directed to a drivetrain assembly for a wind turbine. The drivetrain assembly includes a gearbox having a ring gear, an annular torque support, and at least one flexible component configured therebetween. More specifically, the ring gear includes opposing inner and outer circumferential surfaces separated by side circumferential edges. The side circumferential edges include a rotor-side edge and a generator-side edge. The rotor-side edge has a first set of circumferentially-spaced teeth. The torque support has a generator-side surface having a second set of circumferentially-spaced teeth. Thus, the first set of teeth of the ring gear are configured to engage the second set of teeth of the torque support so as to couple the ring gear to the torque support. In addition, the flexible component is configured between the first and second sets of teeth so as to control vibrations in the wind turbine, e.g. transmission of gearbox-generated vibrations. Thus, location of the flexible components allows for improved bedplate stiffness of the wind turbine.