EMD introduced their new 710 engine in 1984 with the 60 Series locomotives (EMD SD60 and EMD GP60), the EMD 645 engine continued to be offered in certain models (such as the 50 Series) until 1988.
EMD memperkenalkan mesin baru bertipe EMD 710 tahun 1984 dengan lokomotif EMD 60 Series (EMD SD60 dan EMD GP60), mesin EMD 645 diteruskan untuk ditawarkan dalam berbagai model (termasuk EMD 50 Series) hingga 1988.