Eighty three examples of this model were built for ATSF in the early 1990s.
 ATSF was the only railroad to order it.
 There was also one GE prototype and testbed, rebuilt from the prototype B39-8E.
The "W" suffix to this model's name indicates that it differs from the B40-8 in having a "wide nose" safety cab.

GE was almost commissioned by ATSF to make a B unit (cabless booster unit) version of this model, but because the price would have been the same for B40-8Ws with cabs or without, ATSF decided to order units with cabs only.

All of ATSF's B40-8Ws became part of BNSF, and many were later reliveried into one of BNSF's liveries.

Some have since been sold to other operators.

Power output: 4,000 hp (2,980 kW) 7FDL-16 turbocharged diesel engine
Eighty three examples of this model were built for ATSF in the early 1990s.  ATSF was the only railroad to order it.  There was also one GE prototype and testbed, rebuilt from the prototype B39-8E.
The "W" suffix to this model's name indicates that it differs from the B40-8 in having a "wide nose" safety cab.
GE was almost commissioned by ATSF to make a B unit (cabless booster unit) version of this model, but because the price would have been the same for B40-8Ws with cabs or without, ATSF decided to order units with cabs only.
All of ATSF's B40-8Ws became part of BNSF, and many were later reliveried into one of BNSF's liveries.
Some have since been sold to other operators.
Power output: 4,000 hp (2,980 kW) 7FDL-16 turbocharged diesel engine
GE Dash 8 Series