A rotary shifter assembly, including a knob (13, 164) bi-directionally and biasingly supported upon a housing (14, 160) in a monostable and return-to-center orientation, said knob including a pair of pawls (152, 154) and corresponding springs (156, 158); a printed circuit board assembly incorporated into said housing and including a sensor and a processor; a spur gear rotatably supported within said housing and actuated by said knob, said spur gear supporting a magnet in proximity to said sensor; said assembly characterizing: said knob including upper and lower assembleable components, said lower assembleable component being rotated in a clockwise direction and corresponding to said pawls (152, 154) interfacing with a first subset set of communicating sloped surfaces (212, 214) associated with peaked locations (196, 198) configured upon an inner circumference of the handle, said lower assembleable component being rotated in a counter-clockwise rotation corresponding to said pawls (152, 154) interfacing with a second set of communicating sloped surfaces (218, 220) configured upon the inner circumference of the component, said housing including a perimeter defining window from which partially projects the spur gear; a display component including a ribbon connector extending to said printed circuit board assembly; said lower assembleable component including a similar ring gear configured upon a lower circumference of said lower assembleable component, said ring gear including inner teeth which interface with and rotate said spur gear with end supported magnet; rotation of said knob causing said ring gear to rotate said spur gear, with rotational displacement of said magnet relative to said sensor causing said processor to instruct a change in shifter position; and said knob incorporating a graphical display of said display component for indicating a current shifter position (112, 114, 116, 118, 120) of the assembly. said knob including upper and lower assembleable components, said lower assembleable component being rotated in a clockwise direction and corresponding to said pawls (152, 154) interfacing with a first subset set of communicating sloped surfaces (212, 214) associated with peaked locations (196, 198) configured upon an inner circumference of the handle, said lower assembleable component being rotated in a counter-clockwise rotation corresponding to said pawls (152, 154) interfacing with a second set of communicating sloped surfaces (218, 220) configured upon the inner circumference of the component, said housing including a perimeter defining window from which partially projects the spur gear; a display component including a ribbon connector extending to said printed circuit board assembly; said lower assembleable component including a similar ring gear configured upon a lower circumference of said lower assembleable component, said ring gear including inner teeth which interface with and rotate said spur gear with end supported magnet; rotation of said knob causing said ring gear to rotate said spur gear, with rotational displacement of said magnet relative to said sensor causing said processor to instruct a change in shifter position; and said knob incorporating a graphical display of said display component for indicating a current shifter position (112, 114, 116, 118, 120) of the assembly.