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Boîtse de transfert 4x4 transmission to the wheels ChatGPT A 4x4 transfer box, also known as a transfer box or four-wheel drive transfer box, is a system used in cars and four-wheel drive vehicles to distribute power to all four wheels evenly or as needed. This system transmits and distributes engine power to the front and rear wheels in different proportions to improve stability and running power in different driving conditions. The 4x4 transfer case consists of a group of mechanical components, including gearbox, drive axle and front and rear separator. The driver can control this system by switching it to different modes, such as front-wheel drive, rear-wheel drive or all-wheel drive. In FWD mode, the engine's power is directed to the front wheels only, providing additional stability on the road and improving fuel economy. In rear-wheel drive mode, the engine's power is directed to the rear wheels only, giving the driver more stability and traction when driving off-road or in challenging conditions. In 4WD mode, engine power is channeled to all four wheels equally or in adjustable ratios, for maximum traction and stability when driving off-road, in snow, mud or sloping conditions. In short, a 4x4 transfer box distributes engine power to the wheels in a way that enhances stability and downforce in a variety of driving conditions, and helps improve vehicle performance in off-road or challenging driving conditions.