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Holy crap that's cheap. You should sell that out of the back of your truck at Aberdeen ;)

My question wasn't really "What did they come with?" it was more "Will GL1 90W work safely as an alternative?" I'm sure I could prolly order pails of 80W90 GL4, but if GL1 will work and it's on the shelf, then I'll use it. I appreciate the technical data Jed.

Thanks Jed, I had seen that post before, very helpful. API GL-1 : Non-additive lubricant oil for mid level service conditions spiral-bevel, spiral, chronic endless gear type differential and some plate gearboxes. It would seem that my differentials and t-case could fall under this...

Great, thanks guys. I'll grab a couple of pails and try it out.

Hey, Have any of y'all used the Napa 90W GL1 gear oil in your diffs or t-case? I found a good price on some in the 5 gallon pail at my local store. It might be a little thick for a tranny in winter, but I would think it would be OK for diffs or t-case. Since I need 11 gallons of the stuff, I...