by 1951, the remaining d locomotives were shunters, the d locomotives providing suburban goods and branch line goods and passenger service, and the d performing both branch line and mainline service. however, with the massive postwar upgrading of the vr locomotive fleet as part of 'operation phoenix' came the introduction of j class 2-8-0 branch line steam locomotives and t class (emd g8) diesel electric locomotives to replace the various remaining d locomotives.