Mopar 8 3/4 question

I have a 3.55 8 3/4 rear end that I want to know if it is a one wheel peel or a posi? I can not see any clutches but I am not sure what it is!

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It's actually a Spicer power lok and it is the best posi out there, the more power you put to it the harder it pushes on the clutches, all the parts are available to rebuild it if it needs it. I have rebuilt many of them.

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