Two of us have shown u the RPO G80 designation is simply a GM code for a traction enhanced diff, either limited slip or locking. Why don't u show us where it says G80 means locker only and G?? means limited slip only?
Holy crap, why are you taking this personally?
I'm not arguing with you. Go back and read what I actually wrote. I said on our trucks g80 was full locking, period. You brought in the RPO code from other vehicles which have no bearing on this discussion (and I assumed you were talking about our trucks)
I'm saying I would like to see what actual model number of eaton diff is in the aam800 for our trucks. People here, in this thread have argued the LS additive/full locking thing TO DEATH. This is supposed to be a site with FACTS, not conjecture.
So, to that point - and to help anyone who comes here for information and doesn't want to read umpteen pages of people arguing back and forth if our trucks need LS additive for them someone should get the documentation to back it up and POST it here for reference, since sticky threads are for REFERENCE.
I AM however saying that links to a fan site shouldn't be taken as law, and when you link to gm-trucks.com it's as reliable as Wikipedia. It's a community run site with a community built database. Your link proves that g80 is GM's code for a differential, but doesn't tell you what is inside or what the required fluids/additives are.
For all we know, some model years of trucks could have different eaton model number differentials inside the bell housings (or even non-eaton brand) than other years. G80 just means something intended to mitigate slip is there, so who says all models 2004-2012 got the same kit?
In this thread, we see an anonymous post that no one can confirm is legit saying to use 80w90 with no LS additive for all GM light trucks with a G80 RPO code. In our manuals, it just says a synthetic 75w90, which contradicts that bulletin. You can't find Mobil 1 gear lube WITHOUT LS additive (at least in my area) which leaves Amsoil and Delco.
I'm saying, with the intent of ending discussion around something that should be fact, that part #'s and official bulletins from GM (OEM assembler) and Eaton (presumed manufacturer) should be available SOMEWHERE. Anyone who has ever worked in an industry making anything knows that somewhere those lists exist and are on file for legal and liability reasons down the road, along with batch numbers and production dates/locations for what was put in our trucks with vin# references.
I'd like to see them HERE. We should have the resources to get them with the amount of experience and connections of the membership. If they are all the exact same model #, great. Then it's a simple one line post with recommendations both from GM and Eaton (or the actual manufacturer) on fluids and service intervals.
That's all. Post the facts from the horses mouth for the membership. I'm not talking about YOU personally doing it. I'm saying someone who is a member here who may be able to get that information to help the site. It exists, and it's ridiculous that it's not readily available to the public (GM's fault).
