As observed most of the south bound train from Mumbai are hauled through out by diesel engine. This train is hauled by WCAM from Mumbai to Igatpuri, from Igatpuri to Itarsi by WAP/WAM and from Itarsi to Allahabad it is hauled by WDM, which consumes more then one hour in all these changing procedures. why this train is not hauled through out by WDM like south bound train. it will again reduce the running time from 50 to 60 minutes.