The Allison 4000 Series™ brings the superior performance of electronic controls to the heavy-duty, class 8, commercial truck industry. At the speed of light, the engine and transmission communicate to provide precise, perfectly timed shifts whomever the driver, and the road or load condition.

Available in close or wide ratio the 4000 Series™ performs the precise shifts on and off the highway with no power interruption meaning faster route times with less driver effort for more efficiency.

Fully automatic shifting means the driver can pay full attention to steering- a critical advantage in difficult or tedious driving conditions.

Vocational Model 4000 Series™ electronics are programmed to meet the application of the vehicle. It all adds up to safer and more productive operations.