of its ex-Norfolk Southern and some of its original SD40-2s. Additional specifications Original owners Variants SD40T-2 A variant of the SD40-2 was created for several western railroads for extended periods in tunnels and snow sheds. Originally purchased by Southern Pacific and Rio Grande railroads, these were transferred to the Union Pacific Railroad in 1996. They have since found their way into the used locomotive market and many have been sold to regional railroads around the U.S. British Rail Class 59 Another variant of the SD40-2 was created for Foster Yeoman, a British quarrying and aggregates company, which features a unique body design specifically for the European railway markets. Designated as Class 59 the initial production batch of four locomotives entered service in 1986. SD40-2W The GMD SD40-2(W) is a Canadian-market version of the SD40-2 diesel-electric locomotive, built for the Canadian National Railway by the Diesel Division of General Motors of Canada Ltd. (formerly General Motors Diesel) of London, Ontario; 123 were constructed between May 1975 and December 1980. SD40-2F The EMD SD40-2F was a locomotive operated by Canadian Pacific Railway. It is essentially an SD40-2 with a full cowl hood. CP was the only buyer, buying 25 units, numbered 9000-9024. Most have been scrapped, but 10 were sold to the Central Maine and Quebec Railway. When CP acquired CMQ in 2020, the 10 SD40-2Fs became CP’s once again. One unit was rebuilt to a hydrogen fuel cell locomotive in 2021-2022. Rebuilds A number of SD40-2s have been rebuilt into other models. Some of the most unusual are the metre gauge BB40-2s for use in Brazil. Conversely, several other models of EMD locomotive have sometimes been rebuilt to SD40-2 standards, including the SD40, SD45 and SD45-2. Normally, this consists of electrical upgrades (-2) and replacing the 20-cylinder prime mover with a 16-cylinder version, often built for GE Capital in Poland using EMD's manufacturing drawings and specifications. An outgrowth of this may be GE Transportation's second-sourcing of EMD repair parts. The unusually troublesome SD50 have also been rebuilt into the equivalent of SD40-2s, rather than scrapping them. The 645F block and crankshaft are inherently good designs (indeed, the lessons learned with the 645F became part of the 710G); lowering the rating from at 950 rpm to at 900 rpm solved the mechanical and electrical reliability issues. SD40-3 The Dash 3 suffix is not part of any official lineup, and is a loose