Thetransmission has 4 forward gears and one reverse gear. By a differenttransmission onto the countershaft, the split group makes it possible for 4further gears each to be found between the 4 other gears to be shifted. Aplanetary gear train acts as a rear-mounted group, with the result that the 8gears can be used in fast mode or in slow mode. In this way, a total of 16gears is available. The rear-mounted group and the 4 basic gears are shiftedmechanically on the model, split group pneumatically. Transmission input shaft,main shaft, countershaft and reverse gear, the control forks with gearshiftlinkage, pneumatic cylinder and the rotor oil pump are very easy to see. As thetransmission has a weight of about 320 kg, it has been fitted on a trolley.