by The Roadie » Tue Apr 17, 2012 12:01 pm
I guarantee it's fine. Sorry I missed this thread at first. ALL of the trucks (except early build 2002) use the same front diff housing, even the SS. Chilton's is often wrong. The GM Owner's Manual writers were also often wrong.
I think the root cause was sort of like the 150A alternator question that always gets asked at the parts stores when you need a serpentine belt. Originally, GM was going to have two different alternators available, and they shared that data pre-launch with the aftermarket parts supply software companies like Mitchell. By the time the trucks hit the showroom floor, GM was only using the 150A version. And the software guys never got the memo to change it. I tried to educate them in 2005. I really tried.
Same mystery has always been there for the front diff housing. Most parts suppliers ask how many yoke mounting holes you have. I think ONLY the very early 2002 models, the same ones with the rogue 14mm weakling tie rod ends, ever had a housing with one hole. All others have two. There may or may not be a difference in fluid capacity in that early design that didn't survive.
But it's all moot in any event. It doesn't matter what the documents say. You put it in until it meets the bottom of the fill hole. Done. How ever much it takes.