U5: Four Wheel Drive Systems

Which type of four wheel drive is primarily front wheel drive using a differential or viscous clutch to transfer power to a rear axle?

all wheel drive

Which type of four wheel drive is primarily a two wheel drive, in which the remaining two wheels engage when driving wheels slip and then, when four wheel drive is no longer needed, the transfer case disengages?

auto four wheel drive

Which system shifts power to the front axle to lock hubs?

automatic locking hub

Which system uses spring tension to release a clutch from the splines?

manual locking hub

Which type of four wheel drive typically has four wheel low range to provide more torque to the wheels, and can be switched from two wheel drive to four wheel drive?

part-time four wheel drive

Which system uses power from the motor or an auxiliary pump to lock hubs?

vacuum locking hub