Interchangeable rail to jackshaft conversion

A garage door operator (GDO) system comprising:

• a sectional garage door movable on rails between an open position and a closed position;
• a motorhead operable to provide power for movement of the sectional door between the open and closed positions via turning of a drive tube in a jackshaft configuration or via movement of a trolley in a ceiling mounted configuration, the motorhead having a motor output shaft extending from a motorhead casing, the motorhead casing comprising a mounting interface disposed proximate to the motor output shaft;
• and
• a GDO conversion kit for transitioning a GDO between the ceiling mounted configuration and the jackshaft configuration, the GDO conversion kit comprising:
• a track assembly comprising an input interface shaped to mate with the mounting interface to operably couple the motorhead to the sectional garage door in the ceiling mounted configuration;
• and
• a transmission assembly comprising an input coupler shaped to mate with the mounting interface to operably couple the motorhead to the sectional garage door in the jackshaft configuration, the transmission assembly being interchangeable with the track assembly and further comprising an output coupler to operably couple the transmission assembly to the drive tube to alternately open and close the sectional door, the output coupler comprising an output pinion,
• wherein the input coupler comprises an input pinion operably coupled to the output pinion via a flexible coupling member,
• wherein the transmission assembly further comprises a transmission housing configured to extend around at least a portion of each of the input pinion, the output pinion and the flexible coupling member, and a coupling bracket to operably couple the motorhead to either a wall or the ceiling,
• wherein the mounting interface comprises a first mating pattern disposed in the motorhead casing to orient a guide rail of the track assembly relative to the motorhead casing when the motor output shaft is operably coupled to the input interface of the track assembly, and
• wherein the mounting interface comprises a second mating pattern disposed in the motorhead casing to orient the transmission housing relative to the input coupler when the motor output shaft is operably coupled to the input coupler.