These days many vehicles are being offered with 4WD systems.  It can be difficult for consumers wanting to purchase a car with 4WD to distinguish between the different systems.  There is Part Time 4WD, Full Time 4WD and permanent 4WD.  So, what’s the difference?

The most basic of the 4WD systems is Part Time.  This allows the driver to choose if they want to drive in two-wheel drive or 4WD.  This sounds appealing, but has a downside.  The 4WD shouldn’t be engaged unless it is very slippery.  The reason for this is that 4WD will lock the front and back wheels.  Although this is good for slippery conditions, it makes for awkward handling on dry surfaces.  This system is, however, less expensive and very durable.

The most commonly used system is Full Time 4WD.  This system offers a two-wheel drive mode and 4WD.  Also, there is a high and low mode for various conditions.  An advantage to this system is that a center differential allows the front and back wheels to rotate at two different speeds.  Also beneficial is that this system offers more control and better handling on different road conditions.

Permanent 4WD is comparable to Full Time, yet it doesn’t have a two-wheel drive mode.  The car will always be in 4WD with this system.  Torque is being applied constantly to all of the wheels, which allows for traction in various weather conditions.  This system has high and low modes that are applied automatically.

Four- wheel drive is a great feature to have on any vehicle that may encounter challenging road conditions.  However, with any technology make sure that you purchase an auto warranty to cover you from paying unnecessary repair costs down the road.  This will allow you to have peace of mind.