Yes, the automatic transmission can hum when driving for several reasons:
*Low Transmission Fluid: Insufficient transmission fluid can cause gears and bearings to wear, causing a droning noise.
* Contaminated Transmission Fluid: If transmission fluid is contaminated with metal shavings, dirt, or other solid particles, it can cause increased wear and droning noise.
* Worn gears or bearings: Over time, automatic transmission gears and bearings can wear out, resulting in backlash and humming.
*Faulty torque converter: The torque converter transfers power from the engine to the transmission. If it is faulty, it may cause humming or vibration.
* Problems with the donut: The donut is a torque converter component. If it is deformed or damaged, it may cause humming or noise.
* Problems with the parking mechanism: The parking mechanism may jam or bind, causing a humming noise when driving.