Nowadays, simple shaft and planetary - transmissions are the mostly used type of transmissions in construction machines. They are designed in order to achieve the same number of gear forwards, as well as backwards and, they consist of the main gearbox and a reverse gearbox is necessary to engage and disengage one or more control components in order to gear the chosen speed gear in these transmissions, whereby a single gear pair is often used in one speed gear only.
On the other hand, differential transmissions enable us to achieve by its construction to split the power into more flows, so they offer higher number of speed gears at lower count of gears and control components.
A planetary set, working as a gear at several speed gears, in other speed gears as a differential represents the base of the transmission. The principle is a base of the described powershift differential transmission with three flows of power.