Ouch, did they sell it to you as an LSD? Was it a Fleabay jobbit?

looks like this
 

can I have your e:mail coz this site won't let me post up pictures under any circumstances. I have a couple of pictures of the internals of mine and it looks slightly different as in you can't see the internal gears on mine as there is a casing around them??

You can't see the internal gears that easily on the S13 LSD regardless of whether it has an LSD or not.

You need to host your pics in a site like photobucket to post them here.

If you can turn the left and right shafts in opposite directions easily than you unfortunately have an open diff.

I think it is an LSD
 

Yes it is an LSD, hold the prop shaft end solid hold 1 driveshaft side and the other shouldn't turn freely, if it does turn freely its not an LSD. If it turns with resistance it's an LSD. Turning opposite sides means nothing.

Turning opposite sides does mean something. If they're very tight to turn in opposite directions it's an LSD.

The only LSD which turns like an open diff and is nearly undetectable by hand unless you look without the cover is a helical type LSD.

We think you know nothing
 

So what is a quaif A.T.B. Diff then???? !!!

Thats a helical type diff.

I do know something thanks. If you want advice, then don't say 'we think you know nothing'.

I have an S15 helical diff and S13 LSD so I have a fairly good idea what I'm talking about

?
 

So if you can jack up a sierra 2wd cosworth and turn one wheel the other will turn in the opposite direction and they all have LSD's as standard. Whereas if the car is in gear leave one back wheel on the ground jack the other wheel up it will turn but there will be lots of resistance coz it has an LSD

Sierra's have viscous LSD's like the S13. Unless the LSD is fucked they wouldn't behave like that.

My shitty old Xantia will have a locked wheel if you leave it in gear and only jack one side.

pic
 

the picture posted by jackiefan shows that the internals look different to mine it has the plates around the outside of the planet gears. The one in the picture shows the planet gears visible, mine can't be seen for the plates??