This seems like a reasonable place to ask, as this thread seems to be the closest match for my question which I could not find an answer.
I have the factory LSD in my stock 35. On my last gear oil change, I purchased a bottle of the factory LSD additive from our local Chrysler dealership, and had the oil change place use it. From the several oil change places I have used for diff's, the question about the LSD additive ranges from "we have this flavor" to "none is needed". They did honor my request to add it, but I could tell that they probably would have given me the none needed reply had I asked.
So, a couple of questions. First, I would assume the/a additive is needed? Second, as our Chrysler dealership has bit the economic dust, is there something that I can find at a local Autozone/Napa/O'Reilly's that will work?
We do still have a Ford dealership, perhaps the 8.8 additive will suffice?
I trust you guys more than I do the parts guy behind the computer, and certainly more than the local oil change places.