Buy the Polaris OEM shop manual. There is a wealth of info in them and it will give you a better understanding of how the different parts of your machine works. Even if you don't do your own repairs, just having a basic understanding will enable you to better communicate with your mechanic. As a side note: TIP said that the rear axle is solid, it isn't. It's a fully independent rear axle. He may have meant that there is no differential and both wheels are locked together. The only exception are the machines, like my '08 Model T, that have the "turf mode" in which you can lock/unlock the rear wheels from each other, allowing them to turn independently of each other.