humming noise in first gear - help

93til

Member
Hey all,

I need help identifying a new low pitched humming noise that seems to be coming from the engine. It almost sounds like a bus when it starts moving from a complete stop.

Please take a listen (particularly at the 2, 4, and 6 second marks): SndUp | Post info

- I am driving in a parking lot and take my foot off the gas in between those pronounced noises in the audio file. It is barely noticeable in park or at a stop. If I had my foot on the gas the entire time, the sound would be consistently there. That is, the sound increases as the gas is pressed more, to a point...
- The noise only seems to happen at very low speeds, so first gear or so
- It doesn't seem to affect drivability, although I do notice my shifting at higher gears/highway speed seem a little rougher lately
- 2012 FX35, 135k km, original owner, well maintained and babied, mostly city driving and short trips

Edit: Hooked up my OBD2 reader and it's clean. See screenshot.20230320_162311.jpg

Any insights or questions are very welcomed - please help. Thank you!
 
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