
Single-stage torque converter (6-type and 8-type) shall be of 3-element 1-stage turbine type torque converter and the turbine shall be of 1-stage.
The 1-stage turbine type stall torque ratio (torque ratio at starting) is smaller in comparison with the 3-stage type, but the efficiency is higher, and as the torque imposed on no load engine shall become smaller, the torque converter is suitable for driving construction machinery and transport vehicle.