Rear-wheel drive vehicles, including passenger cars, trucks, plus others, have the engine and transmission aligned straight back. These cars are equipping with a long driveshaft between the gear and the rear axle differential.
Therefore, the drive shaft is responsible for transmitting the engine power and the rotation of the gear to the wheel through the rear differential.
Many luxury and high-performance brands of luxury cars and sports cars still prefer this rear axle drive because it provides good engine power transmission performance. As well, the truck uses a rear axle system to transmit all the power, spinning the wheels carrying massive loads.
All-wheel drive vehicles such as small, medium, and large trucks, SUVs, use a drive shaft that transmits power from gears to the front and rear wheels. These cars were both transversely engineered and straightened to drive the rear wheels. The powertrain is designed differently for each vehicle model. There will be a Transfer case, which is a power transmission gearbox that receives power from the engine to deliver to the front and rear wheels.
Transfer cases are useful for vehicles where the driver can choose to power transmission on all four wheels, either front or rear wheels. These cars will be equipped with a front and rear multi-axle drive to deliver power to all wheels. Engine power transmits to the front and rear wheels in a 50-50 ratio.