2 way diff and ratio's answered

[skinnynphats200]

Lift both rear wheels and turn one wheel, if the other one moves in same direction it's a 2-way, 1.5 way or viscous diff. If the other wheel moves in opposite direction it'll be an open diff.

Not sure on helical one ie the way it spins.

If someone has any comments please post but please stick to facts and own experience as internet is full of bullshit.

Ok both wheels spin the same way, but I was told that all this indicates is that I have some sort of an lsd, but does not indicate a 1.5 way or 2 way?
I would like to know is there any other way of telling what diff it is without taking it out and opening it up