[arminder_d]

In canada all 91+ 240sx's had VLSD. Now...easy way to check...

Hoist car into the air, start it up and put it in first gear and let off the clutch. Get out of the car and attempt to stop one tire. Use a rag so you dont hurt your hands. If you can stop the tire you dont have an LSD. If you have a lot of troulbe stopping it you have a viscous. If you cant stop it no matter how hard you try you have a mechanical.

Another way is that if you spin one wheel, both should spin in the same direction. This method doesnt always work because if you have a mechanical lsd with worn clutches itll give you a false idea.