Do not tow full-time four-wheel drive. What do you mean, you can't tow it? why

Full-time four-wheel drive, please don't trailer, that is to say, the vehicle is a four-wheel drive, and the trailer can't be used like an ordinary predecessor, with serious consequences: 1. Because the full-time four-wheel drive is the driving wheel, when the four wheels of the trailer are still connected by the rotating shaft, no matter which set of wheels are installed on the trailer, the other wheels will now roll and rotate with the ground, which is easy to damage the central differential; 2. If you don't remind the trailer driver, it is easy to cause serious losses. Most importantly, many ordinary trailers are impossible. 3. The trailer will be damaged by the sectioning box (friction clutch type central differential), because the four-wheel drive four-wheel drive, if there is a speed difference between the four wheels, will be connected to the broken shaft or any connecting parts.