Posi identification

[Sport/Truck]

I'd like to know how to identify a posi when scouting wreaking yards.
I found an old truck that had the "no wheel spin" option and pulled the diff cover off. I don't think it was a posi. Can someone post a picture of what it should look like? Is there an easier way to spot them with out pulling the cover off?
s/t

[MAK191]

here is what the one in my 70 looked like

[raycow]

Originally Posted by Sport/Truck

Is there an easier way to spot them with out pulling the cover off?

You will need to get one wheel off the ground and the transmission in neutral if the truck still has a driveshaft. Now try to turn the wheel by hand. If the wheel is difficult or impossible to turn, there is a good chance you have posi. However, don't lay down your money until you get the cover off, because it could also have frozen brakes or really serious problems like rusted internals.

Ray