The EMD F40C is a 6-axle 3,200 horsepower (2.4 MW) diesel-electric locomotive built by General Motors Electro-Motive Division in 1974 for commuter service in Chicago.

Locomotives #600-#609 and #613 were the first to be retired in 2003 and had their road numbers unregistered with the Federal Railroad Administration.

[4] The locomotives passed to Metra on the latter's creation in the 1980s but continued to operate on the ex-Milwaukee lines.

[8] In 2005 Kansas City Southern signed a contract with Helm Leasing to use 12 for nine months.

[9] In the spring of 2009, 611 and 614 were returned to revenue service on both of Metra's ex-Milwaukee Road commuter lines.

Towards the end of 2016, with many F40PH-2 and F40PHM-2 locomotives being sent out for rebuild, there was an increased likelihood that the 611 and the 614 will be put back into service.