Although outwardly similar to the original T class units, it was fitted with dynamic brakes, and became a regular on the steeply graded Cudgewa line.

In October 1992, six low nose locomotives were sold to Australian National with five entering service as the CK class as shunters and bankers in Adelaide.

One was resold to SCT Logistics with the remaining four operating on the narrow gauge Eyre Peninsula Railway as at January 2014.

The locomotives had their bogies removed and were placed on concrete blocks, side-by-side, at the Bob White Electrix facility at North Shore.

Others were sold to Chicago Freight Car Leasing Australia, El Zorro, Great Northern Rail Services, SCT Logistics, Southern Shorthaul Railroad, and West Coast Railway.