The search function is great for this type of thing. http://www.ukstarletowners.com/topic/79993-how-to-tell-if-your-gearbox-has-lsd-or-not/#entry990550 If you don't have that it's a non lsd box. However you could still have an aftermarket lsd. I.e trd cusco kaaz etc these all just use standard non lsd gearbox parts