Most motor vehicles use epicyclic gearboxes to transmit power between mechanical devices. Our multiple planetary gear trainers have been designed to perform demonstrations, in progress or in TP from simple manipulations and measurements. The mechanism as well as the kinematics of the trains are clearly visible. To reduce friction to a maximum, the transmission elements mounted on ball bearings. The apparatus is a version comprising 2 planetary gear trains. Pulleys and graduated discs are attached to the input and output shafts of the gearbox for the experimental determination of gear ratios and efficiency. A version with a three-speed train (two forward gears and one reverse) is also available as SAN418.