So what exactly do your rear wheel bearings do? Believe it or not, those small steel balls or rollers (depending on the type of bearings you have) support the entire weight of your vehicle. This is no small job to accomplish for a small piece of steel, so it's important to take good care of your wheel bearings. This means keeping them clean and full of grease, and replacing them when they're worn. A clean and properly greased bearing set will last thousands of miles, even tens of thousands. On the other hand, a few grains of sand can invade your bearings and turn them to junk in a very short period of time.
This tutorial will show you how to clean your wheel bearings, and how to replace your wheel bearings if they go bad. If you aren't sure what's wrong with your suspension, check our suspension troubleshooting guide for help.