Four-wheel drive (4WD or 4x4 for short) is the original term and is often used to describe truck-like vehicles that require the driver to manually switch between a two wheel drive mode for streets and a four-wheel drive mode for low traction conditions such as ice, mud, or loose gravel. The "all-wheel drive" (AWD) term is a marketing term used to sell primarily on-road 4WD vehicles. However, in Australia, AWD is generally used for passenger vehicles that drive all four wheels all the time (e.g., a Subaru), whereas 4WD is used for vehicles designed primarily for heavy off-road use, normally with a low range transfer case (e.g., a Toyota Landcruiser). The terms are thus quite vague in modern usage.great06 said:Why it's called 4x4?
All 4 wheels driven, then call it 4x4 right?