continually and exceeds its set value u2212 2 the device will shift far down gear that is to say shift down two gears for one times after shift over far over down or far down gears it will enter the stable period of locking the gear for several seconds till reaching the set speed at its gear or releasing force as exceeding the set time subsequently will enter the mode of shifting gear according to the normal speed the said device enters the manual mode after its scm is switched on and can enter the automatic mode when the gearlever do not be located on the r gear position and the speed is equal to or greater than 0 if only the manual clutch switches said above are turned on twice or more within one second the operation said above can be replaced by a trigger switches on a appropriate position in the cab or on the hmi touch screen in the automatic mode shifting reverse gear or reversing vehicle unintentionally the automatic mode will be forced to the manual mode when the vehicle running in the automatic mode it is invalid to shift forward gear by hand in any mode when checking out not shifting neutral gear after stopping for few minutes or after the scm rebooting for few minutes the device will shift neutral gear automatically and maintain the previous mode in any mode when being stillness can shift gear or shift neutral gear if only the scm receives.