But he said all s4 TII's came with lsd hmm mabe I should go look at that burnout mark again.

all turbo2's came lsd so if you have a turbo2 it is lsd and if only one tire is spinning you have a problem not a lack of an lsd haha so take a look at it and like jims said the easiest way is to check it and see if it says "lsd fluid only" ect

Cool thanks I guess Im gonna go try it.

All US spec TII's came with LSD. The S4's came with a clutch type LSD. When the LSD clutch packs wear out, it works like an open diff. It is very possible, even probable that your TII acts like an open diff.



Lastly two marks on the ground are not a clear cut indication whether a car has an open diff or not. I can leave two black marks on the ground and I have an open diff.

LOL!!! Hey your making things alot more diffcult, nah jk https://www.nopistons.com/forums/pub...R#>/tongue.png

still, what lsd to get if i wanna autocross / drift ???

I don't know if this will help, but my LSD didn't have any tab on it. The only difference I noticed was that on the casing, there were raised lettering, MO55 2 on the open diff, and MO55 1 on the LSD diff. When mounted on the vehicle, these markings are upside-down, I think on the passenger side of the diff casing.