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Old 06-04-2019, 11:08 AM
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Axle leak?

Hey everyone,

I have a JKU with about 40k on the dial. I recently changed my diff fluid and noticed that there are some wet spots on my axle. I cleaned them up with brake cleaner but it looks like they came back. When I touch them, I don't get any oil on my fingers and it's never dripped on my garage floor.

I'm wondering what you all recommend for a course of action with this or if I don't even need to worry about it. FWIW my diff oil didn't seem to be low when I replaced it.

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Old 06-05-2019, 09:53 AM
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Some details I should have added before. I used 80w-90, filled the diff with the Jeep on a flat surface up to the bottom of the fill hole and have 39,600 on the odometer.

I'm hoping this is covered under the power train warranty but if not, maybe I can epoxy the spots and paint?

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Old 06-05-2019, 09:54 AM   #3
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that is actually pretty common and doubt they will warranty it. if you think how an axle is made you can understand why they seep (not a leak) in this area. the axle tubes are pressed into the pumpkin and then then welded thru the holes that are in the pumpkin. in a 100 years it would never seep enough to lower your oil level.
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Old 06-05-2019, 10:00 AM
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If this is common and not an indicator of a bigger issue, I can just let it roll. It doesn't seem to be spreading any further than what's in the picture. I just wanted to make sure I don't burn through my power train warranty and miss out on a fix.

I guess if it's going to be an issue, it will probably happen in the next 20k miles.
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Old 06-05-2019, 10:09 AM   #5
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Quote:
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If this is common and not an indicator of a bigger issue, I can just let it roll. It doesn't seem to be spreading any further than what's in the picture. I just wanted to make sure I don't burn through my power train warranty and miss out on a fix.

I guess if it's going to be an issue, it will probably happen in the next 20k miles.
it never hurts to ask but just be prepared for the "it's normal" answer.
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Old 06-06-2019, 12:25 AM   #6
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You can always take it to the dealer and have them document it and check it at your request. Then, if it does become an issue you have something to support your request for a warranty replacement.
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Old 06-06-2019, 08:12 AM
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Good call, I'll have them take a peek the next time i'm in for an oil change.
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Old 06-06-2019, 08:37 AM   #8
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The only downside to bringing it in for a look-see is that they will replace your head and tell you you need a new engine. *I keeeed*
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Old 07-22-2019, 09:21 AM
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Just to follow up and close this out, I took my Jeep into the dealer and they're going to replace the rear axle assembly under warranty. I didn't think to ask at the time but does anyone know if the assembly includes gears?
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Old 07-22-2019, 01:15 PM   #10
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Just to follow up and close this out, I took my Jeep into the dealer and they're going to replace the rear axle assembly under warranty. I didn't think to ask at the time but does anyone know if the assembly includes gears?
An axle assembly should include gears, an axle housing does not.
I would be afraid to let the dealer replace the housing, which involves swapping the gears over. If they are replacing the axle assembly you should be fine.
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Old 07-22-2019, 01:40 PM
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The invoice says "assembly" to the tune of $2800 so I'm guessing it's not just the housing. Thanks

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