柴油機車
With the advent of T&amp;NO/SP's Diesel locomotive fleet after World War II, ALCO PAs were often assigned to the "Sunbeam". The "Hustler" was discontinued on August 11, 1954, and the Sunbeam received a new schedule that allowed it to depart Houston's Grand Central Station in the morning and return from Dallas in the afternoon, now using just one set of equipment instead of two. The new schedule lasted only thirteen months, and the Sunbeam made its final round trip on September 11, 1955.