A sample from the products for the Transmission include: Shaft-transmission In, Nut,20mm, Bushing,output,3rd&4t, Washer,29.9x40x1.5.
In this schematic the "Ball-steel,5/32" is used most often.
The Transmission is made up of components including this Gear,input 3rd&4th,23 which is the most expensive.