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The M1123 is identical to the M998A2 for almost everything. Marines wanted the truck without the rear bumper and to have the deep water fording stuff already installed. The M998 or M998A1 is a different frame part number than the A2 trucks. So depending if the M998 rolling chassis is an A0 or...

I have a soft top. I added a solid piece of metal to mount the evaporator in the cab, then purchased a fender mount condenser instead of the bulky external unit because I've changed my configuration a few times and actually use my rig as a truck, not a showpiece. my thread on that...

don't need the tallest extensions, but do need a little in order to not hit the aluminum of the tub as the arms flex under the weight. Tall screw jacks are to prevent the truck from rocking off the front or back of the lift arms if the center of gravity shifts. With the lift arms so close...

even with the stud/nut still sitting there, the stud itself can shear between the manifold and that nut. It's easier to inspect it for that from the top. part of the issue on mine was that the exhaust manifold flange wasn't machined flat, so the stud would bend to the side as it was tightened...

evaporator unit bolted to the rear wall on the inside, so those long tubes blew into the driver's area. Condenser bolted on the outside of the back wall, or possibly on the roof.

on my truck it once appeared that the power steering pump was out of alignment. What it turned out to be was the rear bracket that secures the generator to the engine (on my truck it went to an exhaust manifold stud)had the exhaust stud broken off,a broken gen/PS bracket bolt, and the last 2...

Stalling, turning off, and unable to move in drive sounds a lot like a fuel system issue. Revving the engine with no load on it doesn't require very much fuel compared to trying to move it, and in H it takes more power than in L Code 71 is a transmission issue; it has nothing to do with how the...

as far as I know, they are all mechanical.

I buy the Lucas Multi-Vehicle ATF at NAPA Reading the tech data sheet on it, it meets DEX 1, 2 ,and 3, but not DEX 6. Going by Viscosity, at 40C it's 38.3, so higher than the numbers springer listed above. Also it specifically states it is recommended for use in all power steering applications...

personally, I'm running DEXIII in my power steering. I'm not constrained like the military supply chain to minimizing the amounts of different fluids I stock for my equipment, so I see no reason to use a single fluid if there are others that are better.

According to the newest version of the TM for ECV/REV trucks, DEXVI is used in all systems in the truck. However: GM put out a bulletin not long after they put out DEXVI Bulletin clearly said only to use DEXVI in automatic transmissions. It also clearly stated that other applications where...

IROAN = Inspect and Repair Only As Necessary, with a date of August 2009, when they installed the Marine Armor Kit components. Nothing to do with original manufacture date. I'll agree with the others here, going by the serial number it's very likely to be originally manufactured between...

...And now the Great Western FMTV Roundup (which is being renamed to something overlanding related) is going to be at a different location as well, due to the person putting it on having to move. Should still be about the same dates as last couple years, but that makes 2 summer events getting...

Napa "specialty" batteries only come with a 6 month warranty. For about the same price you can pick up group 24 AGM batteries with much better warranties. These days as far as I know the 6TAGM are the only batteries being used by the military for these. Much longer lifespan, better CCA, and...

you can use wood or plastic spacers under and around the batteries to hold them in place and add enough height. Or spacers between the hold down and the batteries. You could also do a sleeve spacer over the bolt under the nut on the J-bolts to push the bracket down far enough to secure the...

I talked to a Marine buddy of mine a few years back. According to him, they had so many trucks in inventory, that a lot of them really did just sit out in the desert waiting to be used or disposed of. On my M1123, also 32 original miles, refreshed at 26 miles in 2010, I only needed to replace...

engine should be 180+ for temp. Don't trust the gauge in the dash for accuracy; it's there more as a general guideline, and you only worry about it when something changes. Use a laser thermometer on the head near the thermostat to verify. I'll second TOBASH, ether is bad in these engines...

1)There is no real maximum hose length. Of course, shorter hoses are better, but all it really does is makes it so you need slightly more refrigerant in the system (but in a vehicle you probably wouldn't notice the difference) The RED DOT aircon systems have the compressor in the front, the...

could still cut it down and adapt it to fit the Alley Cat.

Lots of threads on batteries, and lots of differing opinions. As long as it's a matched pair of batteries over 700CCA each, and can be fastened down securely you should be good. (matched being the same brand and model of batteries with identical manufacture dates) maintenance free are better...