The ZF AS Tronic gearbox is an automated manual gearbox. This means that a modulator (AS Tronic) takes over shifting for the driver. Intelligent electronics select the optimum gear depending on the driving situation. Due to the optimum switching behaviour of the AS Tronic modulator, the motor always operates in the most efficient speed range and thus saves energy/fuel. We provide the mechanical lower section of the AS Tronic unit for MAN, Iveco, DAF and Renault.