Allison Transmission’s 3000 Series is designed for medium-duty commercial vehicles and is engineered to adapt and operate efficiently in a variety of applications. The 3000 Series includes close or wide ratio gearing and a maximum rating of 336 kW (450 hp). The addition of 5th Generation advanced electronic controls enhance operation and prognostics capabilities. An optional integral output retarder for better vehicle braking and reduced brake wear is also offered. With up to seven available speeds, including two overdrive ratios and several engine-driven Power Take-Off (PTO) provisions, the 3000 Series is built to make medium-duty vehicles more fuel efficient and easier to operate.