1986 Marmon Heavy Duty Wrecker. What I have is a 1986 Marmon with a 400 big cam Cummins with a 13 speed transmission- The truck runs good and everything works and it also has cold ac- Has good tires for the most part and the jakes do work. The Marmon truck was a low-production handmade truck sometimes dubbed the Rolls-Royce of trucks- Citation needed An overcrowded American truck industry and t...