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throwing the switch doesn't shut down the truck, but does it have any effect on the transmission control module? Do you get stuck in limp mode or does it still work properly?

that gauge should be more than enough. It doesn't care what the fluid is, just the pressure. So at this point you have plenty of pressure going out of the valve, all that is left is a couple hoses and the fan clutch. It's always possible that the issue is somehow a failed hose, but unlikely...

on the plus side, most of the parts you replaced are ones that do fail from time to time, so having spare ones on the shelf doesn't hurt. Also all things considered, it was relatively inexpensive at only a few hundred dollars, compared to the thousands that some people have thrown at issues with...

Yes, I've read every post in this thread. It does jump around a bit to be honest, and with everything going on, it seems that each of the individual pieces of the system pass when tested individually, but that overall the system still doesn't appear to function properly. At nowhere that I read...

My suggestion at this point is to open up the manual TM-9-2320-20-1 to page 2-164 and follow the flow chart diagnostics all the way, performing every single test that it tells you to without skipping any of them. Don't make any assumptions that just because you replaced a part that it "must be...

If you carry enough pulleys and some spare winch line, you can usually find a way to winch yourself out in any direction (provided you have something to hook your winch line to.) of course, most of my driving is in the forest, so plenty of trees to use if I need to hook up to something, but...

This is sounding more and more like a battery/electrical issue to me. Warm engines take less power to crank them. Just to verify, what batteries are you using? How old are they? Have you had them tested? Have you tried a cold start after putting a charger on the batteries?

Have you verified that the hoses between the cadillac valve and the fan clutch are clear? The next logical thing that could be the issue would be failed/blocked lines. I suppose I should ask where you are disconnecting the lines to use air to cycle the fan clutch during testing. If it's right...

when the starter disengages, is it still spinning and running up against the flywheel, or does it just kind of stop and not spin at all? My very first thought is to take your batteries in and get them tested.

you'll probably want to ask them about it, before you hand over any paperwork. Sometimes the people behind the counter have no clue at all, and will either try to modify your paperwork, or refuse to give it back to you.

Washington State sent out a letter a few years back telling licensing offices not to process military vehicles unless they had proof of an FMVSS decal on them. Nothing in the laws actually says they can't, it's just some bureaucrat at the state level trying to flex their muscles or something. It...

okay, that does answer my question.

Am I missing something about how these trucks electrical system work? It was my understanding that the 12V to the TCM was operated by a relay powered by the 24V system. With the 24V system disconnected, wouldn't that also mean that the 12V system can't be operated either? Or does the 12V...

no upgrades, as the M1123 already has the upgraded version. From the video, no idea if the CV is actually bad. Most likely it's still okay, and it's just the 6 bolts that need replaced. Some were obviously missing, which adds stress to the remaining ones, causing them to break. Should be...

You want to be able to tow a heavy, high wind load at high speeds... I'll second the "you need to find a different vehicle. HMMWV with it's independent rear suspension is going to get pushed around more by a trailer than in a solid rear axle civilian truck. For reference though, my M1123 4...

is it an A2 variant or an ECV truck? According to the manuals, an A2/M1123 truck (non turbo 6.5 with 2.73 gearing) has a sustained top speed of 78mph. An ECV/REV truck with turbo 6.5 and 3.08 gearing has a top sustained speed of 70mph. Early trucks with the 3 speed transmission had a sustained...

transfer case is possible though not likely. Most commonly when we see someone post about only being able to move in HL it's a failed half shaft/CV joint. Not uncommon for the bolts holding the shaft to the differential flange/brake rotor to back out and shear off. I've only heard of a...

After charging the battery to full, let it sit for a few days to a week before doing anything else to it. Then check for voltage, and if voltage is good, do another load test. My guess is you will find that the battery, while it will charge up and pass a load test immediately after charging...

Diesel vapors are nowhere near as volatile as gasoline vapors are, so the risk of explosion is almost non-existent for just having the little sparks created by a brush type motor and the few vapors being released from unheated diesel fuel. I would definitely NOT recommend this method for a...

Should also verify that the fuel lift pump is working.