The differential equipment is a part of the power transmission device. The driving force produced by an engine can be transmitted to the tires gear rack through various types of bevel images?q=tbn:ANd9GcQEAEC6 7lhEd5SqrZoyjlSz66elQaFwgU4P8LYe3ai7MRuHPTsgears. Differential equipment is definitely representative of the automotive elements that incorporate this kind of bevel gears.