The Allison Transmission 4000 Series^TM is designed for heavy-duty vehicles where smooth and efficient operation is a requirement. The 4000 Series^TM provides power, control and enhanced fuel efficiency.

The 4000 Series^TM  features close or wide ratio gearing with a maximum of to seven speeds, including two overdrive ratios. The 4000 Series^TM  also features a second reverse gear increasing the versatility and control options in applications requiring fine application of speed and power.

The Allison Transmission 4000 Series^TM is rated to a maximum of 597 kW (800 hp). An optional engine-driven Power Take-Off (PTO) capability and output retarder provides enhanced braking and reduced brake wear.

The Allison 4000 Series^TM includes electronic controls designed to provide advanced operation and prognostics capabilities.