Originally Posted by fmugur

I cannot describe well. I hear something like gears/sprockets. I will pay attention on my way home tonight and have more descriptive words. I hope it's not the transmission.
I changed the oil and filter and there was nothing unusual, all clean but the oil darker as expected for 220k km.
It is hard because I only hear it when driving around 20-40 km/h under load, suspecting only the right side. It doesn't happen if I don't accelerate.
I have to drive along a wall to get the sound reflection from under the car for a clearer sound...