What's wrong with Beiqi Magic Speed h2 gearbox without manual upshift?

Cause of failure: improper adjustment of throttle cable or throttle position sensor; The governor is faulty; The governor oil circuit is seriously leaking oil; The vehicle speed sensor is faulty.

Gearbox, also known as transmission, is an automobile accessory used to change the speed and torque from the engine. The transmission ratio of the output shaft and the input shaft can be changed by fixed or step-by-step method.