UP GP40X and Amtrak 321 and 322 depart Denver Union Terminal with the westbound San Francisco Zephyr.

There were only 23 GP40X's built. Union Pacific purchased six of them. These came with the HTB truck which were supposed to improve traction. These locomotives offered 3500 horsepower and were bas... (more)

A pair of GP40X's sit in West Colton Yard. These locomotives were built in February of 1978. Only four units were delivered to the SP. Two were Locotrol masters and the other two were Locotrol sla... (more)

BNSF Y-WAT1041 748 Relief Job climbs Monoco Hill in Lawndale California on its way east from El Segundo.

BNSF Y-WAT1041 748 Relief Job waits for its crew to return from beans at the Lawndale team tracks (which are actually in Redondo Beach, not Lawndale). Power for the train today is elderly GP40X 30... (more)

A BNSF local job heads past a puddle from the heavy rains on its run from El Segundo to Wilmington. The lead unit is an ultra-rare GP40X (now with its turbo pinned, it's classed a GP25).

NORMAN OK (May) 1982 — Santa Fe GP40X 3809, GP50 3817 and GP50 3824 lead train 185 on approach to the Highway 9 overpass. EMD built the unit (s/n 776054-8) in May 1978 and delivered it in blue b... (more)

Technically now a CP GP38, former GP40X 4522 and another GP38 run around their train at the south end of the one time Owen Sound subdivision in Streetsville. The power will now go grab a cut of ta... (more)

One of UP's GP40Xs hangs out in old Mopac (C&EI) territory south of Chicago.

A lone GP40X sits in the yard at Willmar MN.

Santa Fe EMD GP40X No. 3801 rests in the afternoon sunshine of August 30, 1986, at the railroad’s locomotive facility at Corwith Yard in Chicago, Illinois. Flared radiators are a feature of the ... (more)

On a rainy day in July 1981, Union Pacific EMD GP40X Nos. 9000 and 9001 sit at Council Bluffs, Iowa. Easily seen in this photo, flared radiators are distinctive feature of the GP40X. Experimental ... (more)

Only two GP40X's had been painted in the merger scheme, one the 3805 and the other 3803, which had already been repainted back into Santa Fe's standard blue and yellow by September 1986, when t... (more)

CP 4523 leads A84 north at CP Matsqui JCT, as the evening glow fades out into the night.

CP H24 with former GP40X 4522 (now a GP38) has 31 tank cars in tow from Hornby yard to West Toronto.