What Causes the Humming Noise When the Transmission Bearing is Broken?

[MacElliana]

The humming noise when the transmission bearing is broken is caused by the increased gap before it fails, leading to a decrease in fitting accuracy and resulting in abnormal sounds. The transmission, also known as the gearbox, is an automotive component used to alter the speed and torque from the engine, and can fix or change the gear ratio between the output and input shafts. The transmission consists of a gear transmission mechanism and a control mechanism, with some vehicles also including a power take-off mechanism. It can be categorized into stepped, continuously variable, and integrated transmissions, featuring functions such as enabling reverse driving, interrupting power transmission, and changing gear ratios. The transmission is a crucial component in a vehicle, as it can alter the gear ratio and expand the torque and speed of the driving wheels.