posi ? limited slip ? other ?

[sactoC10]

Okay,

I am just learning about these trucks and this board, so this may sound like a silly question, but anyway... In checking the ratio of this rear end I was going to spin the drive shaft and count wheel rotations. I have no wheels on the rear end right now. I also then went to the wheels and rotated one of them and noticed that the other did not rotate...

I then tried it again on the other side, doing the same, the opposite side did not rotate as I expected it to, in the opposite direction.

What does this tell me? Anything good? Something bad?

Thanks.