Update your semi truck with enhanced power transfer, with the Spicer 3.858" SPL250 Series 38-Spline Driveshaft Yoke Shaft that ensures you're Ready for the Road Aheadâ„¢. This replacement piece works to transmit torque and rotational motion from the driveshaft to other components, allowing for forward and reverse motion. Manufactured with improved corrosion resistance to provide long-term reliability.