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ZF AS Tronic is an automated manual transmission made by ZF Friedrichshafen for the bus, motorcoach and lorry market in Europe and North America. It was first introduced in 2003. [1] [2] As is the case with most automated-manual transmissions, it lacks the torque converter that is standard on conventional automatic transmissions. The AS Tronic is claimed to be 500 pounds less than the ZF B500 torque-converter conventional automatic transmission range.
The transmission is offered as 6-speed (referred to as AS Tronic Lite by ZF), along with the core10-speed [3] 12-speed or 16-speed units.