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Old 10-07-2019, 07:59 PM
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Bad Seal?

While putting new brakes on my JKU, I noticed a puddle of fluid/oil right behind my front drivers tire. Found a leak at the axle seal. Would it be ok to drive it to the dealer 2 miles away? Thanks for the help. Click image for larger version

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Old 10-07-2019, 08:11 PM   #2
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Yeah, that looks like an inner seal leak. If it's just seeping (which is what it looks like), then no harm in driving to the dealer.

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Old 10-08-2019, 12:30 AM
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Yeah, that looks like an inner seal leak. If it's just seeping (which is what it looks like), then no harm in driving to the dealer.
I'm not too sure if its seeping or it has been for awhile. When I found the puddle of oil it was a good amount. About 1/3 cup. Do you know if the oil has a tendency to pool up on the joint there? Thanks
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Old 10-08-2019, 01:23 PM   #4
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While putting new brakes on my JKU, I noticed a puddle of fluid/oil right behind my front drivers tire. Found a leak at the axle seal. Would it be ok to drive it to the dealer 2 miles away? Thanks for the help. Attachment 4178999


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Hi RAMM241,
We're sorry to hear about your recent concern. Please keep us updated on your dealer visit. If additional assistance is needed, feel free to send our team a private message. We would be happy to connect you with a Case Specialist to assist.
Alex
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Old 10-09-2019, 12:33 AM
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Hi RAMM241,
We're sorry to hear about your recent concern. Please keep us updated on your dealer visit. If additional assistance is needed, feel free to send our team a private message. We would be happy to connect you with a Case Specialist to assist.
Alex
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Thank you Jeep Cares for responding. My Jeep is at the dealer getting repaired without any issues. I even got a loaner car too...
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Old 10-09-2019, 09:21 AM   #6
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Thank you Jeep Cares for responding. My Jeep is at the dealer getting repaired without any issues. I even got a loaner car too...
Thank you for the update, RAMM241! We're happy to hear that your dealer is taking care of you.
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Old 10-22-2019, 06:57 PM
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Bad Seal?

Just an update. JKU痴 been in the shop for 2 weeks for the axle seal fix. Dealership called and said they discovered a seized hub bearing. Would this be because of the axle fluid loss? I知 not familiar with these components. Any help or information is appreciated. Thanks


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Old 10-22-2019, 11:38 PM   #8
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Best of luck to you man, I had my passenger seal blow out a month or so ago leaving gear oil all over the side of my Jeep...repaired that and now my driver side is leaking. Repairing it with a friend this weekend on jack stands, wish me luck haha.
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Old 10-23-2019, 01:31 PM   #9
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Just an update. JKU痴 been in the shop for 2 weeks for the axle seal fix. Dealership called and said they discovered a seized hub bearing. Would this be because of the axle fluid loss? I知 not familiar with these components. Any help or information is appreciated. Thanks


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No, the hub bearing has nothing to do with the axle seal leak.

The unit bearing/hub bearing is what the wheel and rotor mounts to and is outside the differential. It's in the knuckle.
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Old 10-23-2019, 04:38 PM
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Bad Seal?

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No, the hub bearing has nothing to do with the axle seal leak.



The unit bearing/hub bearing is what the wheel and rotor mounts to and is outside the differential. It's in the knuckle.


Do you know if this has to be removed to replace the axle seal? I just got off the phone with the dealer, they saId the ABS warning light is on and the sensor is bad and the tech can not remove the axle hub. They said this happened after they replaced 3 seals and took it for a test drive. I was told they can not get the hub out at all. There were no issues with the ABS when I brought it in.
They also told me they are having a warranty adjuster come out and look at the issue. I知 just trying to prepare myself for a fight with the dealer. Thanks for all the advise and input.


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Old 10-23-2019, 04:43 PM   #11
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Do you know if this has to be removed to replace the axle seal? I just got off the phone with the dealer, they saId the ABS warning light is on and the sensor is bad and the tech can not remove the axle hub. They said this happened after they replaced 3 seals and took it for a test drive. I was told they can not get the hub out at all. There were no issues with the ABS when I brought it in.
They also told me they are having a warranty adjuster come out and look at the issue. I知 just trying to prepare myself for a fight with the dealer. Thanks for all the advise and input.


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Yes, the unit bearing needs to be pulled to pull the axle when replacing the seal. In your picture, you can see a 13mm 12 point bolt. There are 3 of those and they hold the unit bearing to the knuckle. The ABS sensor is also mounted to the unit bearing. If they took 3 attempts to fix the seal, I'll bet they screwed up both the unit bearing and the ABS sensor.
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Old 10-23-2019, 08:10 PM
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Yes, the unit bearing needs to be pulled to pull the axle when replacing the seal. In your picture, you can see a 13mm 12 point bolt. There are 3 of those and they hold the unit bearing to the knuckle. The ABS sensor is also mounted to the unit bearing. If they took 3 attempts to fix the seal, I'll bet they screwed up both the unit bearing and the ABS sensor.


Thanks for the information. Much appreciated!!!!


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Old 10-23-2019, 08:45 PM   #13
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Bad Seal?

Something fishy here.
They CANNOT replace the seals without pulling the axles.
They CANNOT pull the axles without getting the unit bearing out first.

So how did they change 3 seals without getting a seized bearing out first.

The ABS sensor is in the unit bearing. The sensor going out is usually the first sign the wheel bearing is gone and needs to be replaced.


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Old 10-24-2019, 12:17 AM   #14
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Just an update. JKU’s been in the shop for 2 weeks for the axle seal fix. Dealership called and said they discovered a seized hub bearing. Would this be because of the axle fluid loss? I’m not familiar with these components. Any help or information is appreciated. Thanks


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Seized hub bearing?? That doesn't make sense. That has nothing to do with the seals and you would have felt it while driving if it was seized or not spinning right.



Now you do have to remove the hubs for a seal change and they can be a bitch to get off. You can also screw them up while pulling them off. That sounds the more likely scenario to me.... and if you screw the hub up, there is a good chance you bugger the tone ring inside for the abs sensor.


Indeed I just did my seals, and the next time I do it I'm going to have a spare hub on hand just in case I bugger one of them. They are really tough to get off without putting excessive pressure on the bearing
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Old 10-24-2019, 04:16 AM
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[QUOTE=JTPhoto JK;34558647]Something fishy here.
They CANNOT replace the seals without pulling the axles.
They CANNOT pull the axles without getting the unit bearing out first.

So how did they change 3 seals without getting a seized bearing out first.

The ABS sensor is in the unit bearing. The sensor going out is usually the first sign the wheel bearing is gone and needs to be replaced.


From the research I have done and what you forum members have been advising, THIS is the main issue I have with what I was told. There was no issue with the hub or the ABS when i brought it in. Thanks for the help and info.
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Old 10-24-2019, 04:20 AM
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Seized hub bearing?? That doesn't make sense. That has nothing to do with the seals and you would have felt it while driving if it was seized or not spinning right.



Now you do have to remove the hubs for a seal change and they can be a bitch to get off. You can also screw them up while pulling them off. That sounds the more likely scenario to me.... and if you screw the hub up, there is a good chance you bugger the tone ring inside for the abs sensor.


Indeed I just did my seals, and the next time I do it I'm going to have a spare hub on hand just in case I bugger one of them. They are really tough to get off without putting excessive pressure on the bearing
I was putting new brakes on and rotating the tires when I noticed the leak. Both front wheels spun freely by hand when it was off the ground with no resistance. Wouldn't the wheel with the bad hub be hard to turn? Thanks for the help..
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Old 10-24-2019, 08:01 AM   #17
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I was putting new brakes on and rotating the tires when I noticed the leak. Both front wheels spun freely by hand when it was off the ground with no resistance. Wouldn't the wheel with the bad hub be hard to turn? Thanks for the help..

It depends how bad the hub is but most often hub bearings don't SUDDENLY fail. 500 to maybe 1000 miles before hand they start giving you little tell-tail signs... grinding noises on rotation, more than usual pedal drop on braking, ABS sensor codes.... etc. If you saw none of that before you went in then the chances are good they probably damaged the hub when they attempted to remove it.
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Old 10-24-2019, 08:14 AM   #18
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An Axle seal replacement takes only a few hours. They definitely screwed up the hub while removing the axle shafts. Like previously stated, they cannot replace the seals without removing the hub, so there is no way its seized in the knuckle unless they banged it in at an angle or something.
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Old 10-24-2019, 10:55 AM   #19
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If they can't get the unit bearing out of the knuckle, sounds like they need to replace the knuckle and at their expense. The tech (using this term loosely) did something when reinstalling the unit bearing for the 3rd time, like others have said, probably jammed it in at an angle.

Once he pulled it out the first time, they come out easy if you have to pull it again because you nicked the seal reinstalling the axle.
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Old 10-24-2019, 12:25 PM   #20
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Why do you need to pull the unit bearing to remove the axle? I pull the axle and unit bearing out as one piece. No need to remove the axle nut either. Am I missing something here?
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Old 10-24-2019, 12:29 PM   #21
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For reference here is a pic of my snapped axle pulled with the unit bearing and axle nut still attached.
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Old 10-24-2019, 12:29 PM   #22
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Why do you need to pull the unit bearing to remove the axle? I pull the axle and unit bearing out as one piece. No need to remove the axle nut either. Am I missing something here?
No matter how you pull the axle, the unit bearing needs to come out.

If you pull it in one piece, great. I pull the unit bearing separate from the axle because I lessen the chance of destroying the axle seal. I also have RCV axles. The knuckle needs to come off or I need to separate the CV joint to pull the axle.
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Old 10-24-2019, 01:55 PM   #23
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Why do you need to pull the unit bearing to remove the axle? I pull the axle and unit bearing out as one piece. No need to remove the axle nut either. Am I missing something here?

Whether you choose to do it as one or separately is kind of a moot point. It all needs to come out either way.
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Old 10-24-2019, 02:36 PM   #24
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I guess to me if it saves me destroying the unit bearing and not having to spend time disassembling and reassembling that is a good thing. Others left me with the impression that when replacing an axle seal you must remove the unit bearing (hub) from the axle. When I replace axle seals I do not. When replacing an axle yes. I must have misunderstood what folks were saying.
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Now you do have to remove the hubs for a seal change and they can be a bitch to get off. You can also screw them up while pulling them off. That sounds the more likely scenario to me.... and if you screw the hub up, there is a good chance you bugger the tone ring inside for the abs sensor.


Indeed I just did my seals, and the next time I do it I'm going to have a spare hub on hand just in case I bugger one of them. They are really tough to get off without putting excessive pressure on the bearing

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