AWD and 4WD sound similar in name, but they are very different. AWD is always active on most vehicles, while 4WD can be customized depending on the situation. A lot of people use the terms four-wheel ...
Engineering Explained on MSN
How 4WD works - four wheel drive
How does four wheel drive work? This video explains the workings of four wheel drive (4WD), and gives a definition in order ...
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