New Allison T390 and T390R bus transmissions feature Shift Energy Management providing higher ratings and with durability and economy

Direct control of engine torque through Shift Energy Management enables increased torque rating for buses with no increase in weight or size Allison Transmission has announced the addition of new T390 and T390R models to the proven Torqmatic® Series of fully automatic transmissions for bus applications. These latest models use a high level of powertrain integration to enhance torque capacity, durability, shift quality and economy. To support a continuing trend for ever increasing engine power and torque, Allison is implementing Shift Energy Management (SEM) to dynamically manage torque