The term 'Transmission Component' refers to two parts of a transmission system, namely the GEAR and the gearcase. The GEAR is a four-letter word that is used to refer to a wheel or a cog with teeth that meshes with another toothed part in order to transmit motion or to change speed or direction. The gearcase is an eight-letter word that is used to refer to the housing for the gears in a transmission system. It is designed to protect the gears from dirt, dust, and other external elements.