[1] The first locomotive was completed in October 1970 but was rejected due to rough riding concerns in testing, with five months passing before it was finally accepted after modifications to the bogie design.

After AE Goodwin was placed in administration it was sold to Comeng who completed the last six locomotives with a Mitsubishi alternator in lieu of a generator.

In preparation for the sale of FreightCorp, the remaining locomotives were sold to Great Northern Rail Services, Victoria in 2001.

All were sold to Railfirst Asset Management, who contracted UGL Rail, Broadmeadow to remanufacture 12 units with refurbished General Electric C30-7A components recovered from withdrawn Conrail locomotives.

[1] This involved the locomotives being stripped to the bare chassis and remanufactured from the ground up, the only equipment retained being the bogies, main frames and fuel tanks.

New cabs with desk-top controls and improved collision protection and bodies that retained a dual-cab configuration were fitted.