Algodoo

I'm impressed with how well this scene is laid out, how well it works, and how clean the code is. Excellent job. If you would like more realistic gears, then check out Spur Gear Generator II or Mechanical Toolbox.

@s_noonan Thank you, your scenes are incredible!

honestly we tried everything we could, and there's no going around centrifugal forces... it's a pity. Kilinich's Niva is awesome because of its use of a differential, but it's limited to a rather low speed
The scene is very nice... maybe you could make some low speed vehicle with it?

@The Linkage

Yes, as soon as I saw the planets flying away it became a sad day. The Niva was kick a$$! I had a Nissan Xterra a long time ago that was similar with locking diffs and all kinds of neat stuff. That save file is deleted for some reason though.

I do have a tractor project with a "puppet" animated four-stroke I4. It is currently having cam misalignment issues above 2400 rpm at 300 sim Hz, but I will fine a good setting sooner or later. The tractor will hopefully have some kind of low speed automatic planetary transmission. I was thinking heavy pulling could be fun like irl tractor pulls.