 With only two changes - a one-piece windshield in 1954 (for the preceding 3R series) and a larger rear window in 1955 for the first E series – it was essentially the same cab as was introduced on the 2R series in mid-1948 as a 1949 model.The first E was available with three engines, the Champion inline-six with , the Commander six with , or the Commander V8 with .The heavier 1½ and 2 ton models were available with the bigger Commander V8, with respectively.