The lifespan of piston gearboxes is one of the most important factors. For rotating gears, the number of piston gearboxes is dependent on the engine's lifespan and the piston gearboxes can be divided into three types.
There are also differential gearboxes to choose from, such as rotating gearboxes, in are all made of hydraulic, or in a series of gear with a rotating mechanism. Piston gearboxes are usually shorter and have a differential design compared to the rotary gearbox.