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A lot of "truck won't start" stories on here begin with "I installed a keyed switch" It's probably the number one modification that causes issues. Definitely remove it and go back to the stock switch. The keyed ones won't hold up to the amps being put through it. If you are lucky the switch...

Yes, there is a difference between the two. The M998A2 has heavier suspension and drivetrain parts. M998 and M998A1 drivetrain uses either 7.7k or 10.3k rated halfshafts. The M998A2 12k halfshafts use a different size spline end going into the hubs. Also as noted above the ball joints...

I agree. About the only thing I see is if there are plans to convert the motor to something else in the future.

just an extension, press fit no set screw if it's the same as on my M1123 I ended up having to use a couple of rolling head pry bars to get them off of mine.

The date should be stamped into the block just behind the passenger side cylinder head, visible from the passenger seat with the doghouse removed.

GEP didn't come out until around 2000 or so, so this won't be one of them. Here's how to tell the difference between 6.2 and 6.5 easily...

the wiper motor seems to be the biggest hurdle from what I've seen in other threads/pages

pretty much every HMMWV ends up going through a reset/rebuild at some point. They have a large amount of money to spend bringing the truck back to reset condition, and even if it doesn't need anything they still do all of the major wear items like engine and transmission. I'd be a lot more...

For someone that isn't as familiar with the manuals, then search function can save time. For someone that actually understands the manuals and uses them regularly, not so much. in this regard, many things are easier with paper manuals as you can mark or highlight the pages you look at...

There is a serial number break where the trucks with serial number under 196900 use a different power steering pump and serpentine belt setup (and other some other things as well maybe, but those are the ones I am familiar with) than the trucks after 196900. Then occasionally you get the post...

all modern brake systems are split,so that if something does happen you don't lose all braking power. Typically though it's a diagonal split, so right front and left rear and left front and right rear. I had a couple of my caliper mounting brackets that were loose. I haven't heard of it...

oh, and the M1097R1 trucks before serial number 549000 are 3 speeds, serials 570000 to 599000 are 4 speed trucks.

1097 is the heavy variant, supposed to be able to carry heavier loads than the standard M998

The early trucks had smaller mounting holes than the later trucks. Your M1123 is the same as an M998A2 truck for pretty much everything.

no, you really aren't going to notice any difference with just adding a winch. 100 lbs isn't much weight, even 2 feet in front of the front axle. might shift your center of gravity forward by an inch or two, but that's about it.

and just a note: DOT 5.1 is NOT silicone based. It's the same as DOT 3 and 4, and will mix with them; it just has similar boiling points to the DOT 5 silicone stuff.

the clutch is a dead end system, and the only thing after it is the reservoir so getting a little air into it usually isn't a big deal. Having air applied will provide some force to help unstick everything as you tap on it, but isn't absolutely necessary.

yeah, they got a few more upgrades in the suspension department as they started adding more armor at the factory.

Most inverter type generators won't start motor loads the same way as a conventional generator will. Conventional style it's the rotating mass that helps power past the initial peak current. With inverters it's electronics controlling everything, and either they can't respond fast enough or...

not usually unless someone happened to be in that unit and happens to remember that truck. Quite a few of the M1123s never actually got assigned to units, and just sat out in the Barstow desert for a couple decades before being sold off. I know mine is like that because it only had 32 original...