Or are they an option? If they're an option, is there a way to tell if the car has one? What kind of diff is the limited slip, is it a Torsen? If so, is it a I or a II? Whatever kind it may be, do they have any issues, or are they reliable for the most part? Thanks.

 

All except early base model automatics have a Torsen-type LSD. I don't know enough to tell Type 1 from 2. No real issues that I have seen, certainly a few have blown up but that's usually from being on the wrong end of a v8 swap or some hamfisted driving. Just keep up with fluid changes