xerofuzzion
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I just got my 1988 M998 titled and register, so I took it out for a drive. Came back and saw it was leaking from the driver side Axel boot. Is this something serious?
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88 M998 leaking front Axel shaft
- Thread starter xerofuzzion
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BLK HMMWV
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It's common. congratulations you just bought a High Maintenance Money Wasting Vehicle ( HMMWV for short).
Get your self a set of TM's or check out the TM section .
Start doing your maintenance procedures.
If it's just a cracked boot you can replace it.
if it's an 88 and that's an original boot you got many years out of it.
Get your self a set of TM's or check out the TM section .
Start doing your maintenance procedures.
If it's just a cracked boot you can replace it.
if it's an 88 and that's an original boot you got many years out of it.
cajadao
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The X marked hub might call a more immediate attention.
tage
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Yep the x.
Someone pmcs it and deadlined it.
Someone pmcs it and deadlined it.
tage
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Replace the boot
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The advice given me when my first boot (two now) cracked was to just surf around and find a good cheap surplus NOS half shaft and replace the entire thing. The logic being that it takes MUCh longer to disassemble a half shaft to replace just a boot. I took that advice and am glad I did. I can replace a half shaft in 40 minutes, it would take that long to disassemble the old one I suspect.
So I recommend just grabbing a new old stock half shaft and throwing it on.
Also, as noted, that "X" hub is a warning. I heartily recommend an "open and inspect" on every hub. If something goes wrong on one, and one of mine had water intrusion and a bearing starting to rust, they can detach from the vehicle while in motion in the worst case. It doesn't take long to get one open and serviced, once you practice on the first one.
Welcome to the maintenance, I mean experience.
Bulldogger
So I recommend just grabbing a new old stock half shaft and throwing it on.
Also, as noted, that "X" hub is a warning. I heartily recommend an "open and inspect" on every hub. If something goes wrong on one, and one of mine had water intrusion and a bearing starting to rust, they can detach from the vehicle while in motion in the worst case. It doesn't take long to get one open and serviced, once you practice on the first one.
Welcome to the maintenance, I mean experience.
Bulldogger
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Hmmm, why do folks think this white X means something bad? In my shop on builds I do exactly this to visually see that I have filled the hub, diff, Tcase etc.
This was most likely done to show that the SOUM was applied or some form of other maint activity.
If a component is faulty, we used Red, not white. It’s common for maint facilities at all levels to adopt “local” procedures for things such as this.
This was most likely done to show that the SOUM was applied or some form of other maint activity.
If a component is faulty, we used Red, not white. It’s common for maint facilities at all levels to adopt “local” procedures for things such as this.
cajadao
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In my case, when I found a blue X under a glowplug port, it called my attention... it was a bad swallowed 1.
They knew it, and (thanks) they marked it.
Red color to mark issues is a very good convention... but, we can run out of red pretty quickly. Maybe blue or white is what they had to mark it.
I see X markings, to me, it says: look into this, you have something to fix here.
They knew it, and (thanks) they marked it.
Red color to mark issues is a very good convention... but, we can run out of red pretty quickly. Maybe blue or white is what they had to mark it.
I see X markings, to me, it says: look into this, you have something to fix here.
tage
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My hmmwv had the x's fur popped rivets and a cracked weld on a rear cross member. Gp Failed on those, but they're a crap shoot.
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As cajadao said, the white x could be anything, but it certainly means something and bears a closer examination.
Losing a hub at speed will almost certainly result in rollover and fatality. Not that we're worried about you, but it'll generate bad publicity for the hobby (I'm kidding in case it isn't obvious)
Losing a hub at speed will almost certainly result in rollover and fatality. Not that we're worried about you, but it'll generate bad publicity for the hobby (I'm kidding in case it isn't obvious)
xerofuzzion
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I'll take a look at the hubs, i think all four had X's. I'll definitely make sure they good before my next ride. 
Action
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there are 4 bolts on the steering arm. Take the 8 bolts out of the inspection cover if you want to see inside...
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Agree with draining and opening the inspection cover. New gear oil isn't expensive and it tells you more than peeking in through another access port. Be sure to get the anaerobic sealant recommended, for the inspection cover seal. It's available at auto parts stores from Permatex and others. Just follow the directions and no worries. It is used on other spots too, so it won't go to waste after this single preventive maintenance action.
Bulldogger
Jarretfd246
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Mine had no fluid in all of the hubs, so definitely check yours.