The 2300 class was first introduced into service in 1997. They are the result of a large scale overhaul of members of the 1550 and 2400 clases that is currently taking place at Redbank Workshops.

The locos are fitted with Dash-2 electronics, Turbocharger (in place of the Rootes Blower), Maxi-cab (fitted with a DTC computer, fridge and more). These locos are well liked by the crews that operate them.

The 2300s operate mainly in the south of the state, but members of the class can be found operating in Central and Far North Qld.

There will be 60 in all. Its interesting to note that loco numbers of the 2300 class clash with the original English Electric 2350 class.

2389 (ex 2503D) is the last member of the class to have been produced.

In a surprise move, 9 of the 2300 class are being transferred to Avon and Forrestfield in Western Australia to aleave a rollingstock shortage with ARG. 2370 was the first locomotive to move on Monday 9th July 2007 .

As the last overhaul was completed over 10 years ago, further overhauls are underway to improve the class. 2301D and 2310D have had toilets installed, as well as new repaints in the QRNational livery.