Why are passenger cars and freight cars rear driven, while sedans are mostly precursors?
Buses and trucks are used because the rear axle drive, in parts of car and truck in the center of gravity of the vehicle, when the vehicle is loaded with a focus on the quality after the site is particularly prominent, such as the use of the front axle drive, from the angle of mechanics is obviously wrong, so the passenger and freight cars are using the rear axle drive;
The car is mostly using precursor is also based on the mechanics principle, focus on the quality of cars in the front part, even when the vehicle is fully loaded, cars haven't changed much, the front axle drive more in line with the principle of mechanics.
Because most of the weight of the vans is behind. In order to meet the drive attachment conditions, the rear wheel drive is adopted; and the bottom of the car chassis is easy to arrange and consider the simple structure, etc., most of which adopt the precursor, and the high-grade sedan adopts the rear drive