Ya, I figgered you'd just got twisted up in describin' it. I've personally NEVER done anything like that myself. ;8^) Yeah, right.
Interesting idea about using bar oil.
On the one hand (I'm no kind of mechanical or chemical engineer) I have to wonder if it isn't just a stiff, bare bones oil with little or nothing for additives to give it any longevity. It doesn't need to last. It gets hot once and once it's used it's gone. I doubt it has any of the sorts of things in it that a regular tranny/rear end oil would have for longevity of whatever components of the formulation smooth/cushion the meshing of the gears.
On the flip side, I remember an EXcellent CarQuest shop I used to patronize in the Catskills. They had a little handcrank gizmo sitting on the counter for a diversion while you waited. Clear plastic, two sets of gears inside, each with its own cute little hand crank. Provided by the Lucas folks to promote their additives. Once set of gears, on the left side, was plain gear oil, lower gear carried it to the upper when you turned the crank, and you'd wathc it run right back down. The other side, with the additive, actually made me think of bar oil as the lower gear would move gobs of it up to flow down over the upper gear.
Myself, I'd try something like an 85W140 before I'd try bar oil to stiffen anything. That said, a lot of these old hoss trannies have run for years with water in them, too (you've seen what that looks like!) and are still going, so I can't imagine that an oil for another purpose is going to hurt anything. If you want to try it, I wouldn't suggest more than a quart of bar oil as a stiffener along with four of a conventional gear oil, of whatever grade you settle on.
If you can find some of the Lucas TRANNY oil additive, you might consider using that instead of the bar oil and either buy some or, if nothing else, read the back of the bottle for suggested ratios of additive to regular oil and use that as a guide for how much bar oil you might want to cut in.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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