Prepare your semi to be Ready for the Road Ahead , with the Neapco 1.375" 16-Tooth Steel Driveshaft Slip Yoke that provides reliable driveshaft power when crossing rough terrain. To ensure the drive shaft can move and flex without experiencing mechanical failure, this replacement slip yoke is designed with a Y-shape that pairs with the U-joint. Fashioned with hardened steel to reduce wear and provide long-term dependability. FleetPride is your First Click in Heavy Duty .