TF:
From your pics, there is no clutch pack there. That is an open diff. Since you have 4 x 4, take a look at the front diff. There should be a white label with a bar code and the ratio next to it. 3.92 was the less common factory ratio, as around 33% of the Gen 1 and 2 Durangos had it.

Since you have the 9.25 and not the 8.25 rear end, your D is part time 4x4 correct?

Don

 

Photos 2, 3, and 4 show the LSD clutch assembly – at the top you can see the component that holds the plates together. You have a differential with a locking mechanism.

 

I'll agree that upon a 2nd look, it appears that there could be clutches behind those spider gears. One way to tell quickly. With both rear wheels up off the ground, try to rotate one wheel. If it won't move easily or at all, you have the Anti Spin as Dodge calls it. If the wheel turns, and the wheel on the other side goes the opposite way, the diff is open.

Don

 

This differential is 100% LSD - different shapes
with LSD More Information for DANA 80754
w/o LSD More Information for USA STANDARD GEAR USA20008

Do you see the difference?

 

ww.fm:
I do see that the non AS carrier has a sort of cone shape on the right end, whereas the AS carrier is more squared off.
Hopefully the OP will perform the simple test I outlined, and report back.

Don

 

Hi, thanks for all the replies. It turns out this is indeed an LSD differential, not an open one. I ended up adding a bottle of Mopar LSD friction modifier along with the gear oil.

At first, I planned to do the oil change the “easy way” by pumping the old oil out through the fill hole, but I’m glad I pulled the cover instead — otherwise I would never have discovered that it’s an LSD.

 

TF:
Did you perform the test I mentioned or learn another way? Anyway, you have your answer. I've not seen an LS differential like that, but as we say, you learn something new every day.

Don