The new Allison TC10 blends twin countershaft and full powershift automatic architectures to bring you the best of both worlds. Its revolutionary torque converter and twin countershaft design optimizes vehicle performance and fuel economy to achieve the optimum operation both in urban and highway conditions. Equipped with ten forward speeds, two reverse speeds and 5th Generation advanced electronic controls, the TC10 is designed for superior fuel economy and reliability. The TC10 is suitable for engines up to 447 kW (600 hp) and 2,305 Nm (1,700 lb. ft.). Test fleet users achieved an average of five percent fuel economy improvement with the TC10 over current manual and automated manual transmissions (AMTs).