The EMD BB40-2 is a rebuilt version of the EMD SD40-2

EMD SD40-2

The EMD SD40-2 is a C-C locomotive produced by EMD from 1972 to 1989.The SD40-2 was first introduced in January 1972 as the mid-range offering in EMD's six-axle "Dash-2" series, competing against the GE U30C and the MLW M630...

 diesel locomotive

Diesel locomotive

A diesel locomotive is a type of railroad locomotive in which the prime mover is a diesel engine, a reciprocating engine operating on the Diesel cycle as invented by Dr. Rudolf Diesel...

. 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

GE BB40-9W

The GE BB40-9W is a narrow-gauge version of the popular GE C40-9W locomotive. All 141 examples of this locomotive are owned by the EFVM railroad in Brazil. They are equipped with four B-style trucks, two at each end replacing the conventional C-style trucks. This is necessary because EFVM tracks...

. FCA also rebuilt EMD SD40T-2

EMD SD40T-2

An EMD SD40T-2 is a 6-axle diesel locomotive built by General Motors Electro-Motive Division. Power is provided by a 16-cylinder EMD 645E3 diesel engine capable of producing . The Southern Pacific's locomotive features a fuel tank and is long. The Rio Grande's locomotive features a smaller fuel...

s in the same way, producing the EMD BB40T-2.