Update your semi truck with an updated drivetrain, with the Spicer 2" x 55.63" 1310 Series Steel Unwelded Driveshaft that ensures you're Ready for the Road Aheadâ„¢. This replacement piece transfers the rotational power from the transmission to the shift differentials or axles of a vehicle. Manufactured with durable materials and a high-quality construction to withstand continuous use.