Hi, this is my first ever sound mod, so please be gentle
If you want to lower the braking sound, you can ! You just have to adjust the "wheel" channel in the sound panel in game.
Same for the transmission in the "transmission" panel.
/!\ If you prefer the previous sound, then don't download the update ! (previous sound is 2.2.1)
Preview 3.0 :
Installation: Extract the file in the archive in : Program Files (x86)\Steam\steamapps\common\assettocorsa\content\cars
Here are the videos where I took the samples