Also involved in the overhauls will be the strengthening of the underframe, and fitting of new 2MN maintenance-free draw gear, electronic braking system and full loco rewire and new engine oil coolers. The locomotives will be reclassified as DXE, will have a newly designed long-hood (similar to the DXRs) fitted with chutes, and the short-hood will be lowered. It is planned this will give the locomotives a life extension of 20 years. As of early 2020, the project is on hold due to the cost of rebuilding coming close to, or exceeding the cost of buying new locomotives. 5500 is currently stored as an under-frame.