1. open center differential
As the name implies, is an open differential without any limitation, the differential planetary gear set can operate properly when there is no turning of the vehicle locking device, If a four-wheel equipped with three open differentials in the front, so if one wheel slips, then all power will be wasted in the car on the wheels, while the remaining three wheels is not possible to power.
advantage: there is no particular advantage, because the differential is a prerequisite for the normal running of the car;
Cons: off-road vehicles in the field, an open differential will affect non-paved road turnaround sex.