| Southern Pacific GP9E and GP9R | |||||||||||||||||||||||||||||||||||||||||||||
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 Southern Pacific GP9E #3765 is heading back toward Fremont after a run to Radum, outside Pleasanton in August 1985. | |||||||||||||||||||||||||||||||||||||||||||||
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The Southern Pacific GP9E and GP9R are rebuilds from EMD GP9 diesel locomotives that were built by General-Motors Electro-Motive Division for the St. Louis Southwestern Railway (also known as the "Cotton Belt Route") and the Southern Pacific Transportation Company.
Beginning in 1970 with SP GP9 #3424, all of the pre-existing EMD GP9 diesel locomotives that were on the St. Louis Southwestern Railway (also known as the "Cotton Belt Route") and Southern Pacific's roster were rebuilt into GP9E's and GP9R's with the number series beginning at #3300. [1] [2] [3]
Because of the internal differences of the three 'Phases', different 'rebuild' schemes were required, which meant that they were placed into different number series. As well some got Farr air filter boxes behind the cab of the units. [1]
As the rebuilds had came and went, alongside the un-rebuilt units, no numbers were reused from the Southern Pacific's 1965 renumbering scheme. [1]
The Southern Pacific Transportation Company began rebuilding their units in 1970, while the St. Louis Southwestern Railway (also known as the "Cotton Belt Route") began rebuilding their units in 1974. [1]
Nine of Southern Pacific's GP9E/GP9R locomotives were painted into the Southern Pacific's "Kodachrome" livery of the Failed merger between Southern Pacific and Santa Fe, these units were GP9E/R locomotives #2873, #3370, #3735, #3739, #3775, #3778, #3784, #3792 and #3846. [1]
 | This section needs additional citations for verification .(May 2024) |
Out of all the 283 units that were rebuilt, eight EMD GP9R locomotives and three EMD GP9E locomotives have survived into preservation:
The Southern Pacific was an American Class I railroad network that existed from 1865 to 1996 and operated largely in the Western United States. The system was operated by various companies under the names Southern Pacific Railroad, Southern Pacific Company and Southern Pacific Transportation Company.
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The EMD SD9E was a rebuild from EMD SD9 diesel locomotives that were built by General-Motors Electro-Motive Division for the Southern Pacific Transportation Company.
The EMD SD7R was a rebuild from EMD SD7 diesel locomotives that were built by General-Motors Electro-Motive Division for the Southern Pacific Transportation Company.
The EMD GP9R was a rebuild from EMD GP9 diesel locomotives that were rebuilt by the Chicago and North Western Transportation Company, Grand Trunk Western Railroad, Southern Pacific Transportation Company.