Product Details: Ensure your semi truck is Ready for the Road Ahead™ with an efficient tailgate system, with the Waltco 4.5" Heavy Duty Liftgate Motor. Due to its ability to convert electrical energy into mechanical motion, this replacement motor is able to help move a liftgate up or down as needed. Manufactured with a high load capacity to efficiently transport large and bulky items. FleetPride is your First Click in Heavy Duty®.