Still in front line service more than forty years after it was introduced, EMD's SD40-2 was very nearly the standard locomotive of its day, bought by the thousands to help replace remaining first-generation diesel power. Sharing a standard frame with the SD38-2 and SD45-2, the SD40-2 has a longer frame than the SD40 to accommodate the HT-C truck.
CSX 8387 was built as Chesapeake & Ohio 7528 in 1971, just prior to the Dash-2 line being introduced. It was rebuilt with -2 features, although with the shorter frame, the older trucks were retained.
CSX has rebuilt dozens of SD40-2s since 2010 into the SD40-3 configuration, with new crashworthy cabs, modern control stands, and new heating/air conditioning for enhanced crew comfort.