UPY 937 (S3-2B) is a former Southern Pacific TEBU rebuilt from an SP GE U25B (SP Sacramento shops). She received her 'UPY' number on 29 Aug 2003 and now serves as a CCRCL.
Besides using the GE U25B for TEBU's, four SP U25B locomotives became fodder for the Southern Pacific/Morrison Knudsen TE 70-4S program.
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Somewhere along the way the unit received trucks from a B23 or B30-7.
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