. . "18 spd Roadranger (manual)" . "The Mack Magnum was a B Double and Single application Prime Mover manufactured by Mack Trucks Australia, a division of AB Volvo. It consisted of a Renault Magnum cab and chassis,with an all American Drive line including a Roadranger 18 speed transmission and had either Rockwell or Dana drive axles. Although a 454 hp Mack engine was an option."@en . . "Mack Magnum"@en .