I think that's all the stuff that will come in the S3 physics overhaul, best to work on what is already implemented and needs to be fixed first, diff and clutch models especially so that LFS doesn't have to throw away the old physics and start again like it seems other sims do.
I may be wrong but I don't think Eric works full time on LFS, and I remember Scawen saying he was going to spend his time concentrating on S3 graphics content rather than making high res S2 textures when Becky asked him.