I tried to google a schematic, but with no luck. A few other people are asking for one too, but with the same luck I had. I don't have any experience with an 8.8, so can't tell you if it is a posi or not. With the driver' side wheel on the ground and the passenger's side off the ground, try turning the passenger side rear tire. If it turns, then it is an open rear, but if it won't budge, then it is a locker.