SP started to receive SD45's in late 1966, 8800 - 8844, these first order units were delivered with one small snowplow on the front and SP's trademark signal lights. The handbrake was in the nose. EMD changed the dimensions on the traction motor blower bulge, reducing it …

One interesting modification to SP SD45's, was the testing of the 'Tunnel Motor Radiator' theory. This involved EMD fitting sheet metal 'shrouds', to 3 SD45's, and SP copying the idea, and fitting it to a further 9 units.

When the SD45's were cycled through the Sacramento Shops to be rebuilt, part of the upgrade was the fitting of SP's 5 light package to the rear hood end. Here is freshly rebuilt #7466's rear 5 light package and #7466's front 5 light package.

This page is dedicated to SP's iconic fleet of SD45 locomotives. The SP was the original owner of 355 SD45 units in numerous groups from 1966 to 1971 to both the SP and the SSW. SP/SSW:

The SD45 is a six-axle diesel-electric locomotive class built by General Motors Electro-Motive Division between 1965 and 1971. It has an EMD 645E3 twenty-cylinder engine generating 3,600 hp (2,680 kW) on the same frame as the SD38, SD39, SD40, and SDP40.

The SD45T-2 is a model of diesel-electric locomotive built by EMD for the Southern Pacific Railroad. Like the later SD40T-2 it is colloquially nicknamed a tunnel motor. 247 total units (including the original EMD/SP joint-venture prototype) were produced from February 1972 to June 1975, including 84 for SP's subsidiary Cotton Belt.

Southern Pacific SD45 8963 and its mixed freight are tied down in tjis aentral Oregon town. EMD built the locomotive (b/n 33660) in May 1968. It was rebuilt in Sacramento to SD45R 7499 in March 1984 as part of the M-99 Program.

SP SD45 page: Locomotives with "Elephant Ears" About twelve SP SD45's were equipped with air-intake shrouds on the rear of the units to test the tunnel motor concept. The shrouds were all removed around 1974 following the delivery of the SD45T-2 "tunnel motors."

Southern Pacific SD45R 7551 was the first SP unit to wear the colors of the proposed Southern Pacific Santa Fe merger. The unit originally had white SP initials on the hood and nose, but they were later changed to yellow.

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