ZF 12TX2021TD Gearbox – Heavy-Duty 12-Speed TraXon Automated Transmission

The ZF 12TX2021TD Gearbox is a heavy-duty 12-speed automated manual transmission (AMT) from the ZF TraXon transmission family, engineered for long-haul transport, regional distribution, and vocational truck applications. Developed by ZF Friedrichshafen AG, the TraXon platform is designed to provide high transmission efficiency, intelligent shifting, and reduced operating costs for modern commercial vehicles. The model designation 12TX2021TD indicates a 12-speed TraXon transmission with a torque class of approximately 2,000 Nm and a Direct Drive (TD) top gear configuration. Direct Drive transmissions are optimized for fuel-efficient long-distance operation and heavy-duty commercial transport. Built with advanced electronic shift controls, dual-countershaft architecture, and a modular design, the ZF 12TX2021TD offers smooth automated gear changes, improved driver comfort, and reliable performance under demanding operating conditions. Optional configurations can include PTO systems, hydraulic pump drives, and integrated retarders for specialized vehicle application.