Texas Dorset mechanical quality strongest Tel: 15621249779 gearbox car lovers find automatic transmission lever D block below, the general will to separate a block, two block and other gear, or is set to manual shift function, Obviously when the gear should use these operating conditions, the use of the D block is still unsuitable. This is why it? This requires us to find out the truth automatic shifting. Automatic car is in accordance with the current speed of the vehicle as well as the idea of ??making speed automatic gear change. In the electronic control technology is relatively imperfect period, the hydraulic control has become a major way of moderation. Of the planetary gear set of automatic transmission, the power in the end by a sun gear, a planet gear carrier is coupled with external gear teeth ring input or output, which in the end part of the three braking action member, all of the hydraulic control . When the vehicle is started, the need for large gear ratio high torque output, you need to amplify the output torque policy idea, this time on the need to brake the sun gear, the planetary gear carrier as input power, so that the ring gear as the power output , then the hydraulic control system will brake the sun gear, a ring gear respectively, the planetary gear carrier is connected with the input shaft and the output shaft through the clutch and synchronizer well, the idea of ??making the torque ratio would be amplified by the inevitable ; Qiu Changhong any mechanical transmission Parts Co., Ltd. is the production of the housing assembly, sprocket gear based professional manufacturer.