Samma motor som i T44, en GM/EMD 12-645E på 1235 kW eller 1650 hk. Skillnaden mot T44 är att Tb saknar ljuddämpare, den fick inte plats. Sista vagnen innehåller en drivmotor(kompressor) för transportbanden på vagnarna.
@analyzingfunny Yes, The locos are often called Helicopter on rail. The sound depends of the fact that there is no room for a muffler on top of the engine, a GM EMD 12-645E
Originally SJ (Swedish State railroads) Tb locomotive. They were built for snow clearing and freight trains, mainly used for maintenance and construction. For snow duties they can only run in one direction, so they carry their own jack and pinion so that they can be turned alpng the line.
