U and your U-Joints (Lubricate U-Joints)
If your vehicle’s power goes to the rear wheels, then you have something called U-joints in the drivetrain. U-joints are connectors that allow the rotating power from your vehicle’s engine to deliver its power through a driveshaft to make the rear wheels rotate. You need U-joints because the surfaces you drive on aren’t perfectly flat, and the driveshaft has to allow for some flexibility when you are traveling over uneven surfaces.
