GE Dash 8-40B

The GE Dash 8-40B (or B40-8) is a 4-axle diesel-electric locomotive built by GE Transportation between 1988 and 1989. It is part of the GE Dash 8 Series of freight locomotives.

GE Dash 8-40B
Union Pacific Dash 8-40B #1869
Type and origin Power type Diesel-electric Builder GE Transportation Model Dash 8-40B Build date 1988 – 1989 Total produced 151
Specifications Configuration: ​  • AAR B-B Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Prime mover GE 7FDL16
Performance figures Power output 4,000 hp (3,000 kW)
Career Operators Various, see list Class B40-8 Locale North America

A total of 151 examples of this locomotive were built for North American railroads.

The GE Dash 8-40BW (B40-8W) is a variant fitted with a full-width cab. Another variant is the GE Dash 8-40BP, more commonly known as the Genesis series. The locomotives in the Genesis series are the P40DC, the P42DC, and the P32AC-DM.

Original owners

BNSF B40-8 no. 577 at Havelock, Nebraska, in October 2014. As of 2015, this is the only active Dash 8 in ATSF blue and yellow paint on the BNSF system.

Railroad	Quantity	Road numbers	Notes
Atchison, Topeka and Santa Fe Railway	40	7410-7449	to BNSF
Conrail	30	5060-5089	To NS, later sold to CSXT
General Electric	1	8002
New York, Susquehanna and Western Railway	24	4002-4048 (even nos.)	To CSX
St. Louis Southwestern Railway	55	8040-8094	To Union Pacific
United States Department of Energy (Savannah River Site)	1	107	Sold surplus in 2022. Now ATOM Rail 107
Providence & Worcester Railroad	4	4001-4004	All 4 are still active as of 2025

Preservation

In July 2014, Union Pacific #1848, formerly St. Louis Southwestern #8049, was donated by the Union Pacific Railroad to the Illinois Railway Museum.^[1]

See also

• Trains portal

• List of GE locomotives