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I didn't know exactly what the alloy was, but based on the shearing information provided earlier, I looked in Machinery's Handbook, and selected the kpsi rating of a common aluminum alloy that seemed to fit the observed results: 2024T361 shears at 42 kpsi. 2017T4 shears at 38 kpsi, which is a...

You lost me here. Are you implying that because brass contains zinc, and Grade 8 bolts are sometimes zinc plated that zinc is some kind of strong wonder metal that breaks winches? The aluminum alloy that the milspec pins are made from (2024-T361) contains 93.5% aluminum, 4.4% copper, 0.6%...

Remember that the pistons have a largish combustion chamber depressed into their tops. Any liquid that entered in that way would pool into the combustion chamber, and get tossed out in the exhaust stroke.... the IP just doesn't squirt that much fuel on each charge. -Chuck

I pulled an earlier post where I gave the incorrect definition of auto ignition. Just to clarify: Flash point is the lowest temperature where a heated liquid will ignite in the presence of a flame. Auto ignition is the lowest temperature where a heated liquid will ignite absent any flame. If...

The MSDS for thermonol 59 doesn't list any special concerns with burning, or any special concerns about toxicity. It is made as a pumping fluid, so it probably wouldn't be a problem for seals, or anything in your fuel system. Absent any first hand experience, I guess you will have to try it...

No, they are not... but then Exxon, is not Esso, and BP is not Sinclair, and Detroit Diesel is not GM, and White is not Hercules, and Verizon is not Ma Bell... well the list goes on and on. These companies all are different from the companies they were in the 1960's, when the deuce was...

Hi Paul, I have read those pages in several different revisions of that document, and my read is a little different ( Imagine that! ) : 1) Meritor wants only SAE50 synthetic used in their new transmissions and transfer cases.... a reasonable suggestion given the improvements the synthetic...

First, there are two main organizations that deal with lubricant standards. National Lubricant and Grease Institute (NLGI), and American Petroleum Institute (API). NLGI deals primarily with greases, and API deals with oils. As I understand things (I don't know much about NLGI), API is funded...

I'm just curious, Paul.... Since you have made it abundantly clear that there is no document other than a US Army LO that will convince you that GL5 might be a suboptimal lubricant for use in civilian owned deuce transmissions and transfer cases... And further, you have made it quite clear...

Because the transmission/transfer case manufacturer has no control over how the different additives from different oil vendors may fight each other, they ALL will recommend that you not mix oil types and brands. Because of all of the nooks and cranny's in a transmission/transfer case, and...

The vacuum pump oil used by the heating and air conditioning community would be a mineral oil. It should be fine. -Chuck

It is hard to give a blanket statement when it comes to vacuum pump oil. Some is vegetable based, some petroleum based, and some silicone based. The vegetable, and petroleum based would be fine, but the silicone based, when made hot enough, burns to form silicon dioxide, which is glass. -Chuck

Locked vs. unlocked is not a terrifically large amount of drag in the scheme of things, but leaving my hubs locked (in 2WD), does drag my PU truck's average gas mileage down from about 15MPG to about 10MPG. That would tend to indicate an increase in drag of 33%. Most of the time it might not...

So, how did you learn not to be stupid in that way? Was it innate knowledge you came with straight from the womb, or did someone (or something) teach you not to shift out of 4WD when going up hill in winter weather conditions? I learned not to shift out of 4WD (on anything even slightly...

Not really. It is a trivial amount of mass compared to the 200 lbs of tire, wheel and brake drum. The reason it feels hard to turn is the gears, and bearings, are pumping very thick oil. Think about it, if it was just the mass, once you got it spinning, it should stay spinning (like a bicycle...

And that drag is trying to stop the front wheels from rotating. If you have very little traction, that drag will succeed in stopping the wheels from rotating long before they otherwise would have with the hubs unlocked. Clearly there was a sudden change in torque load, and that caused the front...

Well, you would guess wrong then. The truck was brand new, had brand new M/S tires, I was less than 1/2 mile from my house, and the front differential really had no time to warm up. Its gears were churning very thick gear oil. Since we are blessed with very cold weather, try jacking up a...

Believe what you want, but I wrecked my pickup truck just that way. I needed to travel on about 4 inches of fresh unplowed snow, so I locked the hubs and went on my way. I decided that the truck seemed to have enough traction that I didn't really need to be in 4WD, so I switched the transfer...

Just as a word of warning: When you have your front hubs locked, all that fluid in the differential creates drag, just like you have the brakes on a bit all the time.... which is why you have the hub selectors in the first place.... Well, a differential full of nice cold, stiff oil, and a slick...

That is a huge clue! Looks like you have a clogged inlet filter screen on your fuel pump. Remove the pump from the tank, and clean the screen, and clean the gorp out of your tank. -Chuck