4x4 Parts
As with any vehicle, there are a number of different parts that make up the 4x4 drive system and vehicle. Many of the overall vehicle parts are the same as or similar to those parts in any other vehicle, so here we will focus on parts particular to vehicles with a 4x4 driving system. To fully realize your vehicle’s potential, it is a good idea to know about these parts. This knowledge can help you increase the power and improve the traction of your vehicle.
There are three main parts of any four-wheel-drive system: the two differentials (front and rear) and the transfer case. Part-time systems will also feature locking hubs. These are the primary components; however, both types of systems may utilize advanced electronics to improve available traction even further.
The differentials, in essence, send the torque from the driveshaft to the drive wheels. The differentials also enable the speed difference between different wheels.
The transfer case locks the front-axle driveshaft to the rear-axle driveshaft. This forces the wheels to spin at the same speed. This is typically only used in part-time systems when it would be relatively easy for tires to slip on regular roadways; otherwise in these systems this ability is often disabled to avoid extra wear on the tires.
Some transfer cases also contain a set of gears that provide different ranges for the vehicle to meet different driving conditions. In the low range in this system, for example, vehicles can typically only go about 5 mph; however, the torque is so strong that it allows vehicles to slowly climb very steep hills.
Part-time 4x4 systems also feature locking hubs. Each wheel in the vehicle is bolted to a hub, and locking hubs are usually on the front wheels. When four-wheel drive is disengaged, the locking hubs allow the front wheels to disconnect from the front differential and driveshaft. This helps preserve those parts longer and improve the fuel economy of the vehicle.
In most contemporary vehicles, locking hubs can be engaged from inside the vehicle while driving. These locking hubs are designed to automatically engage when the driver shifts into four-wheel drive. In many older vehicles, however, locking hubs have to be engaged and disengaged manually, by getting out of the vehicle and turning a knob on the front wheels.
Other key parts in modern 4x4 systems include the brake-traction control. Many of today’s vehicles use advanced electronics in the clutch and brakes, which allow better control in torque-transfer between wheels.
Because these vehicles are designed to drive on bumps and all kinds of terrain, the suspension system is very important in 4x4 vehicles. If your vehicle has too much bouncing or doesn’t handle that easily, it could be due to your suspension system. This is something that can be tweaked with a suspension lift kit and other pieces of equipment. A good suspension system is imperative to safety, so it is important that yours performs optimally.
Other important performance parts in 4x4 vehicles include air lockers and compressors. These are important for road recovery. Parts such as battery isolators and cables ensure engine function, and they are very handy to have on hand, especially if you plan on traveling off-road and away from civilization.