The Stars.” Transcontinental sleeping cars By January 1954 the Super Chief had inherited from the Santa Fe's Chief the service of running continuous Los Angeles-New York sleepers continuing from Chicago on the New York Central Railroad's 20th Century Limited and on the Pennsylvania Railroad's Broadway Limited. The Baltimore and Ohio Railroad offered a similar service with Los Angeles-Washington, D.C., sleepers on that company's Shenandoah westbound and Capitol Limited eastbound. However, in October 1957 the PRR dropped its Broadway Limited sleeper connection. Upon the April 1958 timetables, the cooperating railroads terminated their transcontinental sleeper operations. Declining ridership and delay from switching sleeping cars between Chicago terminals were factors in the through-car termination. Timeline May 10, 1937: The last of four "preview" runs of the Super Chief-2, with an improved 3,600 hp (2.7 MW), two-unit, streamlined diesel locomotive set built by Electro Motive Corporation (EMC), concludes as the train pulls into Los Angeles. All heavyweight cars used on the Super Chief are replaced with lightweight stainless steel cars. The public is invited to tour the new train at Santa Fe's La Grande Station on May 11 and 12. May 15, 1937: The Super Chief departs Los Angeles at 7:30 p.m. PST. The train reaches Chicago in 36 hours and 49 minutes, setting a record. Both new E1 units suffered mechanical damage during the trip and were taken out of service for repairs. May 18, 1937: The lightweight Super Chief starts its first regular run, led by Unit 1A and EMC demonstrator Unit 512 (a.k.a. AT&SF Unit 1C) from Chicago's Dearborn Station. The passenger list includes ventriloquist Edgar Bergen and his "sidekick" Charlie McCarthy. (The first pair of E1s were delivered in June.) June 15, 1937: The Super Chief makes its first regular run with EMC E1s 2A and 2B, the first locomotives to wear the famous red, yellow and silver "Warbonnet" scheme. January 1938: E1 Units 3 and 3A are placed in service on the Super Chief. February 26, 1938: Due to production delays, a "borrowed" six-car Chief consist begins running as the Super Chief to allow twice-weekly trips. July 2, 1938: Lightweight cars built by Pullman-Standard replace the Chief cars. Until 1946 each trainset makes a weekly round trip between Chicago and Los Angeles, averaging per day. 1941: The Santa Fe takes delivery of its only 2,000 hp (1.5 MW) ALCO DL-107/108 model locomotives, units 50 and 50A. July 7, 1942: