What must an AWD car have according to Technician A and B?

An all-wheel drive (AWD) car must have multiple differentials to effectively manage power distribution and traction among the wheels. This is crucial for maintaining stability and control on various terrains.

Having a differential in each drive axle allows the wheels on either side of the vehicle to turn at different speeds, which is particularly important when cornering. For instance, when turning, the outside wheels travel a greater distance than the inside wheels; without differentials, this would cause excessive tire wear and difficulty in steering.

The additional requirement for a differential between the two drive axles is essential for balancing the rotation speed differences that can occur between the front and rear wheels. This setup allows the AWD system to distribute torque variably across the differentials to enhance performance on slippery or uneven surfaces.

Thus, for an AWD vehicle to operate efficiently and provide the intended benefits, it must incorporate both sets of differentials: those in each drive axle and the one between the drive axles.