The E series Studebaker trucks are the original 1955 E series Studebaker trucks, sold in half-ton, 3/4-ton, and 1-, 1.5-, and 2-ton capacities, and the1956: 2E series; 1957-58: 3E series; 1959: 4E series; 1960: 5E series; 1961: 6E series; 1962: 7E series; and 1963-64: 8E series. Given these model-year designations, "E series" has come to mean all Studebaker trucks built between 1955 and the end of all vehicle production in the US in December 1963. Within each tonnage rating, these trucks were all fairly similar, since Studebaker was in dire financial straits during this entire period and invested virtually nothing to update its truck division products. For the 1956 and 1957-58 models, all Studebaker trucks were called Transtar.