4 Wheel drives are considered to be the best thing that you could get for long travel times, especially if the travelling is to be done in areas or places that require your wheels to have a good grip and strong movement. It is thought that 4 wheel drives will be able to provide that movement and support for each of the wheels and will give an even spread of power to each wheel to move forward. However, this is not the case with 4 wheel drive cars, rather it is the misunderstanding that people have about it instead.
What happens with a 4 wheel drive vehicle is that it spreads the force through the front and rear differentials of the car. This is not the same thing as all the wheels in your car getting the same force for movement. The way the differentials work is that it allows the force that propels the car forward to go to the wheels that are getting the least amount of resistance. This is done so that the car can move smoothly and cover more distance without having to get stuck in places that prevent a smooth ride. This is not, however, helpful with things such as driving off the road.
When off of the road, you need your wheels to power through whatever comes their way and not get stuck in sand traps, mud, or slippery surfaces. However, with force going to the area of least resistance, the wheels that are not stuck will be moving. This means that if your left wheels are stuck in mud, the right ones will spin around instead of the left working their ways out. To battle this you would need locking differentials put in on all the wheels. You can visit http://www.westcoastsuspension.com.au/ to find out more.