Vehicles with this drivetrain configuration power only two wheels, typically the rear pair, though some models utilize front-wheel drive. A pickup truck with power delivered solely to the rear axle represents a common example. This system contrasts with four-wheel drive and all-wheel drive, where engine power is distributed to all four wheels.
This drivetrain setup offers advantages in specific contexts. Often, these vehicles are more fuel-efficient due to reduced mechanical complexity and lower weight. They can also be less expensive to purchase and maintain. Historically, this simpler design was the standard for light-duty trucks and continues to serve a significant portion of the market, particularly for applications where enhanced traction is not regularly required.
