Abstract: Linearly adjustable torque transmission systems and methods for a power driven machine are provided. The system can include a first wheel adapted to be rotatably driven. The system can further include a second wheel positioned proximate the first wheel that can engage the first wheel such that rotational movement of the first wheel can impart rotational movement to the second wheel. The second wheel can be coupled to a shaft with bearings between the second wheel and the shaft such that the second wheel is movable along the shaft in a lateral direction while the second wheel is coupled to the shaft wherein rotational movement of the second wheel rotationally moves the shaft.