Product Details: Ensure your semi is Ready for the Road Aheadâ„¢ with reliable driveshaft power when crossing rough terrain, with the Spicer 2.5" 16-Tooth Steel Driveshaft Slip Yoke. By using a Y-shaped design, this replacement slip yoke allows the driveshaft to move and flex without experiencing mechanical failure or loss of power. Built with hardened steel to minimize wear and deliver long-term dependability.