The EMD BB40-2 is a rebuilt version of the EMD SD40-2 diesel locomotive. It is used by Ferrovia Central Atlantico in Brazil. Since FCA is metre gauge, there was no longer enough room in the trucks for the original traction motors. Also, FCA does not have a sufficiently high load limit per axle to operate SD40-2s. Thus, they were rebuilt as B+B-B+B units, using the same trucks as the GE BB40-8, GE BB40-9 and GE BB40-9W. FCA also rebuilt EMD SD40T-2s in the same way, producing the EMD BB40T-2.
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