392 Axles Failure?

Hi Lo Silver

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2021 JLU
I am aware that Mopar upgraded the axles on the 392 Rubicons. The front axles no longer maintains the CAD and have CV type axle shafts. I was informed all the axle shafts are chromoly, the tubes are thicker and they also have cast steel outers. I now see Currie is now offering upgraded axles for the 392 specifically. Have any of you had or heard of failures with the stock axles when rock crawling?
 
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Hell what’s another 25k. Put me down for three sets.
 
Let me clarify...I am not looking to buy the Currie axles, just asking if anyone has had their stock 392 axles fail.
 
I have seen zero reports of axle failures. I would expect that even if someone broke an axle whilst rock crawling on any particularly tough obstacles, they probably wouldn't blame the axle.

I see no real reason to treat the 392 any differently than any other rig with D44s. If you're going above 35s and plan to crawl it hard, probably decent idea to truss it. Might bend a shaft if you hit something especially hard. If you wanna slap 40s on it, chances are you already have D60s planned and you know what you're doing.

End of the day, no reasons yet not to trust the axles!
 
I have seen zero reports of axle failures. I would expect that even if someone broke an axle whilst rock crawling on any particularly tough obstacles, they probably wouldn't blame the axle.

I see no real reason to treat the 392 any differently than any other rig with D44s. If you're going above 35s and plan to crawl it hard, probably decent idea to truss it. Might bend a shaft if you hit something especially hard. If you wanna slap 40s on it, chances are you already have D60s planned and you know what you're doing.

End of the day, no reasons yet not to trust the axles!
I wheel mine pretty hard and I have no concerns with the stock axels. Dog said it everything you need to know 🤟
 
I wheel mine pretty hard and I have no concerns with the stock axels. Dog said it everything you need to know 🤟
This is high praise coming from the flex master himself! Your pic in the wheeling thread is 💪 💪 💪
 
This is high praise coming from the flex master himself! Your pic in the wheeling thread is 💪 💪 💪
Thanks, this build was all about the flex and I'm really happy with how it is turning out.
 
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I am aware that Mopar upgraded the axles on the 392 Rubicons. The front axles no longer maintains the CAD and have CV type axle shafts. I was informed all the axle shafts are chromoly, the tubes are thicker and they also have cast steel outers. I now see Currie is now offering upgraded axles for the 392 specifically. Have any of you had or heard of failures with the stock axles when rock crawling?
I’m on 37s with 2.5 Clayton Overland plus lift, Fox 2.5 DSC shocks , have about 20K on my 392 and have been all over my home state of CO and Moab rock crawling. No issues
 
I’m on 37s with 2.5 Clayton Overland plus lift, Fox 2.5 DSC shocks , have about 20K on my 392 and have been all over my home state of CO and Moab rock crawling. No issues
A friend and I both ordered 392’s, extreme package. Now 37’s on Weld wheels. First trip on them was the Rubicon, trailered there from Las Vegas, NV. Next trip was Sand Hollow, Trail Hero, 2 nd day of wheeling his had axle tube failure. Less than 2 k miles. Didn’t know what was happening initiall, would go in to lock, then wouldn’t unlock, etc….He’s relatively new to wheeling, no abuse at all. Bent the tube back on passenger side, then shattered the coupler in the FAD housing that couples the shitty 2 pc. axle. Took it to the local Henderson, NV Jeep dealer, they were complete assholes, told him to get lost and never bring it back. We got a hold of the dealer we bought actually 3 from in NE., Maddox Motors (1100 miles roughly) they have been above and beyond great to deal with. They are fixing the issue. Before I took delivery a good friend that has a popular 4x4 shop here in Vegas said we would have front axle issues…..now I’m trying to figure out if I should save and install 60’s, if so what brand? Mine just turned 3k miles, I installed all the tube weld in braces. This should never be a issue on 37’s. When Jeep was testing and teasing with the 392’s, they were using 37’s. Very disappointed, but love the Jeep as a whole.
 
A friend and I both ordered 392’s, extreme package. Now 37’s on Weld wheels. First trip on them was the Rubicon, trailered there from Las Vegas, NV. Next trip was Sand Hollow, Trail Hero, 2 nd day of wheeling his had axle tube failure. Less than 2 k miles. Didn’t know what was happening initiall, would go in to lock, then wouldn’t unlock, etc….He’s relatively new to wheeling, no abuse at all. Bent the tube back on passenger side, then shattered the coupler in the FAD housing that couples the shitty 2 pc. axle. Took it to the local Henderson, NV Jeep dealer, they were complete assholes, told him to get lost and never bring it back. We got a hold of the dealer we bought actually 3 from in NE., Maddox Motors (1100 miles roughly) they have been above and beyond great to deal with. They are fixing the issue. Before I took delivery a good friend that has a popular 4x4 shop here in Vegas said we would have front axle issues…..now I’m trying to figure out if I should save and install 60’s, if so what brand? Mine just turned 3k miles, I installed all the tube weld in braces. This should never be a issue on 37’s. When Jeep was testing and teasing with the 392’s, they were using 37’s. Very disappointed, but love the Jeep as a whole.
Thanks for the reply Figspeed. I am running BFG 39 X 13.5s. I only have around 3200 miles on mine. I was also at the Easter Jeep Safari and Trail Hero in October. I have not had any issues either, but may switch the axle out to a D60 semi floating to get piece of mind.
 
Hi Lo Silver,
Initally I ordered RCV axles front and rear, I just got a trcking # for them. But I too am intrerested in changing to the Currie D60 axles that retain the stock bolt pattern. We are actually a dealer for Currie axles and RCV, if we can help at any time let me know.
Are you attending Winterfest in Sand Hollow?
 
A friend and I both ordered 392’s, extreme package. Now 37’s on Weld wheels. First trip on them was the Rubicon, trailered there from Las Vegas, NV. Next trip was Sand Hollow, Trail Hero, 2 nd day of wheeling his had axle tube failure. Less than 2 k miles. Didn’t know what was happening initiall, would go in to lock, then wouldn’t unlock, etc….He’s relatively new to wheeling, no abuse at all. Bent the tube back on passenger side, then shattered the coupler in the FAD housing that couples the shitty 2 pc. axle. Took it to the local Henderson, NV Jeep dealer, they were complete assholes, told him to get lost and never bring it back. We got a hold of the dealer we bought actually 3 from in NE., Maddox Motors (1100 miles roughly) they have been above and beyond great to deal with. They are fixing the issue. Before I took delivery a good friend that has a popular 4x4 shop here in Vegas said we would have front axle issues…..now I’m trying to figure out if I should save and install 60’s, if so what brand? Mine just turned 3k miles, I installed all the tube weld in braces. This should never be a issue on 37’s. When Jeep was testing and teasing with the 392’s, they were using 37’s. Very disappointed, but love the Jeep as a whole.
Geez that’s terrible. Maybe just a fluke? I’m not easy on mine at all. Heavy footed and hit corners fast. Along with many rocky trails and stock shafts with no issues. Man I would stick with stock ones
A friend and I both ordered 392’s, extreme package. Now 37’s on Weld wheels. First trip on them was the Rubicon, trailered there from Las Vegas, NV. Next trip was Sand Hollow, Trail Hero, 2 nd day of wheeling his had axle tube failure. Less than 2 k miles. Didn’t know what was happening initiall, would go in to lock, then wouldn’t unlock, etc….He’s relatively new to wheeling, no abuse at all. Bent the tube back on passenger side, then shattered the coupler in the FAD housing that couples the shitty 2 pc. axle. Took it to the local Henderson, NV Jeep dealer, they were complete assholes, told him to get lost and never bring it back. We got a hold of the dealer we bought actually 3 from in NE., Maddox Motors (1100 miles roughly) they have been above and beyond great to deal with. They are fixing the issue. Before I took delivery a good friend that has a popular 4x4 shop here in Vegas said we would have front axle issues…..now I’m trying to figure out if I should save and install 60’s, if so what brand? Mine just turned 3k miles, I installed all the tube weld in braces. This should never be a issue on 37’s. When Jeep was testing and teasing with the 392’s, they were using 37’s. Very disappointed, but love the Jeep as a whole.
Geez that’s terrible! Hope he gets it all squared away. I’m pushing over 22K in mine with the 37s and running trails weekly in CO. Still no issues with stock axels or driveshafts. Would love Currie 60s though!
 
A friend and I both ordered 392’s, extreme package. Now 37’s on Weld wheels. First trip on them was the Rubicon, trailered there from Las Vegas, NV. Next trip was Sand Hollow, Trail Hero, 2 nd day of wheeling his had axle tube failure. Less than 2 k miles. Didn’t know what was happening initiall, would go in to lock, then wouldn’t unlock, etc….He’s relatively new to wheeling, no abuse at all. Bent the tube back on passenger side, then shattered the coupler in the FAD housing that couples the shitty 2 pc. axle. Took it to the local Henderson, NV Jeep dealer, they were complete assholes, told him to get lost and never bring it back. We got a hold of the dealer we bought actually 3 from in NE., Maddox Motors (1100 miles roughly) they have been above and beyond great to deal with. They are fixing the issue. Before I took delivery a good friend that has a popular 4x4 shop here in Vegas said we would have front axle issues…..now I’m trying to figure out if I should save and install 60’s, if so what brand? Mine just turned 3k miles, I installed all the tube weld in braces. This should never be a issue on 37’s. When Jeep was testing and teasing with the 392’s, they were using 37’s. Very disappointed, but love the Jeep as a whole.
i not sure if i missed it but did you have issues as well. or was it just his jeep.
 
i not sure if i missed it but did you have issues as well. or was it just his jeep.
No I haven’t had any issues but, mine has the tubes welded and all the add on welded enforcements brackets. I think I’m going to order Currie D60 axles, use my brakes and unit bearings and add RCV axles to the front. Then sell my 3,000 mile 4.56 factory axles.
 
Trail Hero, 2 nd day of wheeling his had axle tube failure. Less than 2 k miles. Didn’t know what was happening initiall, would go in to lock, then wouldn’t unlock, etc….He’s relatively new to wheeling, no abuse at all. Bent the tube back on passenger side, then shattered the coupler in the FAD housing that couples the shitty 2 pc. axle.
Okay, there was a lot in your post to digest… but I believe I pulled out the important parts:

1) Relatively new driver on a 2.5” lift
2) Bent axle shaft (when he/she/they)
3) Shattered the coupler in the FAD

🤔, sounds like a manufacturing issue, with the stock axle, and I think Dana 80’s (not 60’s) are what’s needed.
 
Okay, there was a lot in your post to digest… but I believe I pulled out the important parts:

1) Relatively new driver on a 2.5” lift
2) Bent axle shaft (when he/she/they)
3) Shattered the coupler in the FAD

🤔, sounds like a manufacturing issue, with the stock axle, and I think Dana 80’s (not 60’s) are what’s needed.
The lift is stock on the 392 Rubicon, bent housing partly because the FAD option housing is the absolute worst idea on a vehicle like this and D80 front 🤣🤣🤣🤣 that would surely do it.
 
The lift is stock on the 392 Rubicon, bent housing partly because the FAD option housing is the absolute worst idea on a vehicle like this and D80 front 🤣🤣🤣🤣 that would surely do it.

In all seriousness… axles do not bend easily and nothing shatters without some serious abuse.

How is your friend’s tie rod and steering stabilizer? I imagine they also took quite a beating.
 
I’m on 37s with 2.5 Clayton Overland plus lift, Fox 2.5 DSC shocks , have about 20K on my 392 and have been all over my home state of CO and Moab rock crawling. No issues
What highway ride difference did you notice from stock suspension?
 
In all seriousness… axles do not bend easily and nothing shatters without some serious abuse.

How is your friend’s tie rod and steering stabilizer? I imagine they also took quite a beating.
After the Rubicon trip he had to adjust the steering link to straighten the steering wheel, stock steering dampener was replaced as well.
 
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