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I'm not going to worry about the additive. That's after having run without it in all the clutch type diffs over the years with no problems, front and rear, and no ill effects that I know of.

I have spent my fair share of time there. Just wish my brain cell could retain more of all the good info.

Materials change, and lubricants change. Still, while I enjoy learning from this discussion I can't help but wonder if gear oil is called gear oil and automatic transmission fluid is called ATF for a reason. It does seem to imply that those fluids are made for different purposes. And then there...

That makes sense, Ken. Thanks for the info. Lifting it would be borderline for my crane, and I have no plans to do it anyway. But since plans are made to be changed, if it got lifted it would be by wheel nets, not the shackles.

Well, since ATF was invented long ago, I suppose that it wasn't developed enough to be used in early transfer cases. Or nobody had thought of using it in such applications yet. Or its use was based on mileage gains. Or all of the above.

Gotta read that later, scottladdy, but for now I'm wondering if it was feasible to run an automatic on gear oil, would they? I suspect that the hydraulic functions got first choice and the gears got to live with ATF as a result.

I'll never forget the surprise when checking the fluid levels in my new '91 V3500 after driving it home. I had not expected to see ATF in there. Sure enough, that's what the manual called for. I put gear oil in there, like in every gear driven transfer case I'd ever owned, suspecting that it was...

In a 205?

Thanks, that's what I suspected.

Here's one for you guys with more CUCV experience. Checked the vitals under the M1031 today in preparation of finally driving it some day, and noticed these brackets. I don't recall seeing such brackets before, unless my '91 V3500 had them, and I forgot. Also found ATF in the transfer case, and...