Growing up in the South teaches you a few things. WheelinÂ’ almost always includes mud, and Sundays are not only a day off, but also the day when them boys from NASCAR get together for a little race. What does this have to do with Jeeps? Well, now NASCAR technology can help you keep mud out of your front axle. These new trick seals from Drivetrain Direct use grease to form a water- and mud-tight seal around your front axleshafts just inboard of the U-joints.