自動變速箱無超速擋是指車輛在行駛過程中，車速已升高至超速擋工作范圍，但自動變速箱不能從換入超速擋；或者是，在車速已經達到超速擋工作范圍后，采用提前升擋，即松開油門踏板幾秒后再踩下的方法也不能使自動變速箱升入超速擋。
Automatic transmission without overspeed gear means that the speed of the vehicle has risen to the overspeed range in the course of driving, but the automatic transmission can not be replaced by the overspeed gear; or, after the speed has reached the overspeed range, the method of lifting the gear in advance, that is, to release the accelerator pedal after a few seconds and then step down, can not change automatically. The speed box rises to the overspeed gear.
如您的車輛出現該故障，建議盡早將車輛送往的維修站點進行自動變速箱維修檢查。
If your vehicle breaks down, it is recommended that the vehicle be sent to the professional maintenance station as soon as possible for automatic transmission inspection.
車輛到維修站點后，如車輛是電子控制的自動變速箱，應先對其進行故障自診斷，查看有無故障碼（如有故障碼，按顯示代碼查找相應故障）。變速箱油溫度傳感器、節氣門位置傳感器、超速電磁閥等部件的故障都會影響超速擋的正常使用。
After the vehicle goes to the maintenance site, if the vehicle is an automatic transmission of electronic control, it should first diagnose it and see if there is a fault code (if there is a fault code, according to the display code to find the corresponding fault). The failure of transmission oil temperature sensor, throttle position sensor and overspeed solenoid valve will affect the normal use of the overspeed gear.
濟南自動變速箱維修
其次需要檢查變速箱油溫度傳感器在不同程度下的電阻值，并與標準值進行比較。如發現異常，應更換變速箱油溫度傳感器。
Secondly, we need to check the resistance of the transmission oil temperature sensor to different degrees, and compare it with the standard value. If abnormal is found, the transmission oil temperature sensor should be replaced.
檔位開關和節氣門位置傳感器信號的檢查也是必經流程。檔位開關信號應與操縱手柄的位置相符。節氣門位置傳感器的電阻或輸出電壓應能隨節氣門的開大而上升，并與標準相符。如存在異常，應根據情況作出調整或更換。
The check of gear switch and throttle position sensor is also a necessary process. The gear switch signal should be in accordance with the position of the control handle. The resistance or output voltage of the throttle position sensor should rise with the opening of the throttle valve and conform to the standard. If there is an exception, it should be adjusted or replaced according to circumstances.
超速擋開關存在故障也會導致變速箱無超速擋。在ON位置時，超速擋開關的解點應斷開，閉合超速指示燈不亮；在OFF位置時，超速擋開關觸點應閉合，超速擋指示燈亮起。
The malfunction of the overspeed switch will also cause the gearbox to have no overspeed gear. At ON position, the solution point of the overspeed switch should be disconnected and the closed overspeed indicator is not bright; at OFF position, the overspeed switch contact should be closed and the overspeed indicator light rises.
針對此故障還需檢查超速電磁閥的工作情況。打開點火開關，但不要起動發動機，在按下超速擋開關時，檢查超速電磁閥有無工作的聲音。如果超速電磁閥不工作，應檢查控制線路或更換超速電磁閥。
For this fault, it is necessary to check the working condition of the overspeed solenoid valve. Turn on the ignition switch, but do not start the engine. Check the overspeed solenoid valve when you press the overspeed switch. If the overspeed solenoid valve does not work, check the control circuit or replace the overspeed solenoid valve.
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