In a GTI for example, rev it up and then go into first, that real slight SSSHHHH sound... what file is that in the sound folder?? I want to replace it with a real tire chirp sound which I have but I can figure out which file it is...
Or at the least, I'd like to give it the same sound as when you rev it and hit REVERSE. Its a completely different sound, which I personally would like it to do when spinning while going forward.

Well, I'm not sure, but it's generated i think.

Hm..it doesnt seem to change tho? No variation just Sssshhhh - generated ones arent editable are they? Not easily I dont think.

its generated real time, so i dont really think it can be changed

Well, the files are there for a reason. Im sure some sort of change can be achieved. I know someone changed the crash sound a while back.

It are SkidRoadHeavyMajor.raw, SkidRoadHeavyMinor.raw, SkidRoadHeavyPre.raw and SkidRoadLight.raw.

But if you open them you will hear that the sound is pitched up 1 octave in real. So LFS pitches the sounds down.