Equip your semi truck to be Ready for the Road Ahead , with the Neapco 2.5" x 15.03" 1710 Series 16-Spline Yoke Shaft, a key component that helps optimize vehicle performance. This replacement piece acts as the connection point between the driveshaft and the differential / axle, ensuring the vehicle can move forward or backward. Manufactured with durable components to provide long-lasting performance. FleetPride is your First Click in Heavy Duty .