Forgot to mention. According to a few videos on the internet the way to establish if you have an LSD is as follows. Jack the rear of the car clear of the ground (don't forget to chock the front wheels). With the hand brake off and the car in neutral rotate one of the back wheels. If the other back wheel rotates in the opposite direction you have a none LSD axle. If the other wheel rotates in the same direction it is an LSD.
Regards Tony