... load capacity:50~60ton - cab with sleeper bed,air-conditioner sinotruk tractor truck 6*4SPECIFICATIONSHOWO tractor truck 6*4(air suspension ... -spring clutch,diameter 420mm,hydraulically operating with air assistanceTransmissionHW19710 sinotruk 10 speed transmission ,synchromesh, ... axle, heavy hub wheel reduction drive axle,with supper loading ability,excellent performance on start-up with heavy load ...