Why does my car sound like it's humming when I accelerate?

Anonymous
I miss the days of Click & Clack when one could call and ask about all the rattles and noises your car makes. Turning to DCUM car gurus for tips

Kia Sedona has started making a humming-type noise whenever I accelerate in the 20-40mph range. I tried to deny it at first. Chalked it up to the wind from the roof rack. It's definitely noticable. It does not hum when idling. It does not hum when braking. It does not hum at lower speeds (like driving through a neighborhood). It only hums when, for example, I accelerate from a stand-still to 20+mph at something like a traffic light or accelerating when entering the interstate, etc. The hum goes away once I reach/maintain speed. The hum seems to be coming from the front passenger side.

No electric problems. The lights, radio, steering, are all fine.

Thoughts?
Anonymous
Just drive until something breaks down. It's almost impossible to find out why until then.
Anonymous
My first thought is either a loose alternator belt, or something in the transmission, as those are the components that are more active during acceleration than while maintaining a higher speed. I don't know how to confirm, though....
Anonymous
Second gear in transmission.

Anonymous
It's a Mazda (sorry to you folks too young to know).
Anonymous
Because it doesn’t know the words
Anonymous
Does the humming change in tone based on the engine speed or vehicle speed, or is it constant.

If it changes with engine speed/vehicle speed, try shifting to a different gear while the hum is going on to see if it goes away or stays.
Anonymous
Anonymous wrote:Because it doesn’t know the words


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