Update your semi with reliable driveshaft power when crossing rough terrain, with the Spicer 2.5" 16-Tooth Steel Driveshaft Slip Yoke that ensures you're Ready for the Road Aheadâ„¢. With a Y-shaped design, this replacement slip yoke allows the driveshaft to move or flex without losing power or experiencing mechanical failure. Manufactured with hardened steel to minimize wear and provide long-term dependability.