interrupt power transmission to the engine starting, idling, and facilitate the transmission shift or power output.РManual transmission is posed of gear and shaft, by different binations to produce variable torque; And automatic transmission AT consists of hydraulic torque converter, gear and the hydraulic control system, hydraulic transmission and bination ways to achieve variable speed torque.РOf hydraulic torque converter is parts AT the most characteristics, it posed of pump wheel, wheel and ponents, direct input engine torque and power transfer to the clutch. Pump wheel and turbine is a pair of work, as if they are relatively placed two fan, a fan blowing the wind will drive the other passive fan blades spin, the flow of air, wind power into the ic energy transfer medium. If replace