SP FEATURES:
Lit number boards (effect in DCC)
3600 gallon fuel tank
Large front plow
Roof-mounted A/C and bell
Modified front L window
P3 horn
Late body with removed class lights and steam generator equipment
By the mid-1980's, SP had discontinued their commute service in the Bay Area between San Jose and San Francisco, CA in favor of the newly organized CalTrain. Since new CalTrain power was purchased, SP in turn converted some of the older commute motive power to freight service. All three GP40P-2's was renumbered into 7600-7602, received larger fuel tanks, and had their steam generators removed. Still retaining their full front SP light package, these units received rebuilt front cab windows, which became common practice during this time. By 1994, only one unit was repainted into SP's “Speed Lettering” scheme, 7600. This unit would eventually be sold off and rebuilt by Indiana Harbor Belt, while the other two remained in UP's Road switcher fleet