Get your semi Ready for the Road Aheadâ„¢ with an effective transfer of engine power, with the Spicer 1000SG Series Full Round Greaseable Universal Joint. By using a flexible cross-shaped design, this universal joint is able to transfer power from the drive shaft to the wheels while the drive shaft moves up or down with the suspension. Built with a precise measurements and a durable body to resist corrosion, rust, and weathering.