A centre diff lock is essential to ensure drive to both the front and rear axles; although, diff locks front and rear are still required to spread drive evenly from side to side.29 dic 2019
How do electric locking differentials work?
During turns, a locking differential operates like an open differential - the wheels can rotate at different speeds. However, when traction is needed, the axles can be mechanically locked together forcing the wheels to rotate at the same speed.
Trucks that respond best to heavy loads typically have an axle ratio of 3.73, 3.92 or 4.10. The numerically high axle ratio like the Ford 3.73 provides the truck more low speed wheel torque and makes it easier to get the vehicle moving.
To help you negotiate uncertain terrain, 4Runner's available electronically controlled locking rear differential distributes engine power evenly to both rear wheels, so they move at the same speed, even if one is off the ground.
All-wheel-drive vehicles often don't have a transfer case lever or switch; instead, AWD engages or disengages automatically based on driving conditions. Some transfer cases have the ability to send all the power to either the front or rear when needed.