Today, thousands of SD70s, and their variants, remains in operation on numerous Class Is around the country. It has become so successful that EMD continuous to catalog the locomotive today with the SD70ACe. The SD70 actually hearkens back to the days of the SD40 model and its successes. Although the SD70 could not regain EMD's dominance as the number one locomotive builder (having lost that to GE in the 1980s) it was still a very successful design with a few thousand different versions of the model operating around the country today (including the SD70M, SD70I, SD70M-2, SD70MAC, and SD70ACe). This recovery first began with the SD60 (and its variants) as the model sold more than 1,000 examples allowing EMD to regain some of the reputation that it lost with the SD50. The Electro-Motive Division's SD70 series has been a big rebound from the failures of the SD50. In 1993, the General Motors Electro-Motive Division (EMD) introduced a radical design change, the SD70 MAC. It was a dramatically improved product that provided the railroad industry much greater economy and efficiency. The EMD SD70 MAC changed the railroad industry the same way the Boeing 707 changed the commercial airline industry.
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