Hopefully this will clear up the confusion pertaining to the different types of heavy duty axles. Many vehicle enthusiasts and experts have found the above mentioned tips to be very helpful. Whether you are working on a car, a pickup truck or an ATV, there are certain restrictions on what kind of axle you can use depending on the type and size of your rig. Always ask professionals for advice when it comes to axles. Not only will they answer all your queries and provide you with sound advice, they will also help you find the right axle.