Allison Transmission’s Torqmatic® Series is a line of fully automatic transmissions specifically designed for the unique demands of city and suburban buses and tour coaches with engine ratings up to 410 kW (550 hp). With up to six forward speeds and one reverse, the Torqmatic® series is designed for easy, efficient operation. The Torqmatic® Series is equipped with an optional retarder, shallow and deep sump options and 5th Generation advanced electronic controls for optimized operation and prognostics capabilities.