Prepare your semi to be Ready for the Road Aheadâ„¢, with the Spicer 2.5" 16-Tooth Steel Driveshaft Slip Yoke that provides reliable driveshaft power when crossing rough terrain. Due to its Y-shaped design, this replacement slip yoke allows the driveshaft to move or flex without losing power or experiencing mechanical failure. Constructed with hardened steel to decrease wear and provide long-term dependability.