No. Model Years Built 200-267 GP7 1951-53 270-289 GP9 1954 300-324 SD7 1953 325-374 SD9 1954-55 4000 4-6-4 1930 steam locomotive built by Baldwin/shrouded in 1937 4001 4-6-4 1938 streamlined steam locomotive built in shops 9900-9908 Zephyr 1934-39 9909 E5A 1940 9910AB-9912AB E5AB 1940 9913 E5A 1940 9914AB-9915AB E5AA 1941 9916AB-9936AB E7AA 1945-49 9937A E7A 1949 9937B E8A 1949 9938AB-9948AB E8AA 1949-50 9949A E8A 1950 9949 E7A 1947 9950AB E5AB 1940 C&S 9960ABC-9962ABC F3ABA 1947 9964-9977 E8A 1952-53 9980AB E5AB 1940 FW&D 9981AB E8A 1952 FW&D 9985AB-9989AB E9AA 1955-56 9990-9995 E9A 1954Diesel passenger locomotive numbering in the 9900 series began with the Pioneer Zephyr, and subsequent Zephyr trains with power cars built by Budd. Power cars with diesel engines were numbered #9900-#9908, while traditional diesel locomotives were numbered beginning with #9909. Power cars and a few E5A locomotives were originally assigned to specific trains, described at the Pre War Streamliners page.
#9960-#9962 were the original locomotives assigned to the California Zephyr, on the Burlington Route segment between Chicago and Denver. The other participating railroads provided their own locomotives over their segments.
#9950AB, #9980AB and #9981AB were owned by subsidiaries Colorado & Southern, and Fort Worth & Denver.
Some locomotives eventually operated exclusively in commuter service in Chicago. Including having head end power auxiliary generators installed, to operate with bilevel commuter cars.
Burlington Route Historical Society