 Although the Class is usually limited to a top speed of , the "Witblitz" regularly attained speeds of on some sections.The "Witblitz" express trains have long been discontinued, but some of the speed limit boards were still in existence between Potchefstroom and Worcester as late as 2005.For a number of years, the Class also became the prime motive power on trains 5558 and 5559, the PX speed-freight overnight container trains between Durban Goods and Johannesburg's City Deep.