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Old 06-28-16, 07:22 AM   #1
Deathrow23
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Default Rear differental leak

Anyone come across their differential leaking? I have 149k Miles and had the dealer change the fluid I think back around 100k or so.
Is this something that just leaks with age or could the dealer may not have done something right. Not sure how long it's been leaking. Is this something I could do myself?
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Old 06-28-16, 08:55 AM   #2
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Is the leak from the drain plug? Hard to tell from the pics. You can try to tighten it a bit. 10mm hex key is needed.
There is a metal washer that goes on the plug. I wonder if they lost it, but then I would have expected it to start leaking almost immediately. If you aren't sure where the leak is coming from, you should clean it up with solvent, dry it and then check later. Overnight might do it.
If it is coming from the oil seal around the axle shaft, then you probably can't do that yourself. And they will probably hit you up for a high bill. I mean you can do it yourself, but it will require disconnecting pretty much the entire suspension for that one wheel and prying the axle shaft out of the diff, then replacing the seal.

If you want to remove the drain plug to see if it is dirty or the washer is missing, remember to loosen the fill plug first. You don't want to drain the diff, then later find out the fill plug is stuck and you might have to take it some where.
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Old 06-28-16, 01:11 PM   #3
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Truthfully, that looks like the axle seal. There is a chance that the diff was overfilled and coming out of the breather at the top when the fluid is hot. Check on top of the diff, near the rear.. Check to see if the breather is coated in oil..
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Old 06-28-16, 04:42 PM   #4
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Quote:
Originally Posted by scott1256c View Post
Is the leak from the drain plug? Hard to tell from the pics. You can try to tighten it a bit. 10mm hex key is needed.
There is a metal washer that goes on the plug. I wonder if they lost it, but then I would have expected it to start leaking almost immediately. If you aren't sure where the leak is coming from, you should clean it up with solvent, dry it and then check later. Overnight might do it.
If it is coming from the oil seal around the axle shaft, then you probably can't do that yourself. And they will probably hit you up for a high bill. I mean you can do it yourself, but it will require disconnecting pretty much the entire suspension for that one wheel and prying the axle shaft out of the diff, then replacing the seal.

If you want to remove the drain plug to see if it is dirty or the washer is missing, remember to loosen the fill plug first. You don't want to drain the diff, then later find out the fill plug is stuck and you might have to take it some where.
I will have to try to tighten. Already put car down. Lol
Quote:
Originally Posted by HankMoody View Post
Truthfully, that looks like the axle seal. There is a chance that the diff was overfilled and coming out of the breather at the top when the fluid is hot. Check on top of the diff, near the rear.. Check to see if the breather is coated in oil..
I'll have to check that. Could that explain why it looks like splatter on the exhaust pipe and underneath the plastic rear?
Maybe that's what I smell when I rev really high? It gets on the pipe?
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Old 06-28-16, 05:30 PM   #5
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Jack the car up, spray brake clean all over the rear carrier housing, and take it for a drive. Return home and inspect for where the leak is coming from. Should be more obvious at this point.
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Old 06-29-16, 04:21 AM   #6
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^^^^^---- This..
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Old 06-29-16, 08:48 PM   #7
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its not leak, and it can't be, i just changed my 2 weeks ago, the Boy at our shop over filled and spilled , i cleaned it sprayed it with brake cleaner and next morning all DRIED UP like a Sahara Desert. spray and blow air gun to get it off. Don't scare me man we have the same mileage lol
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Old 06-30-16, 08:50 PM   #8
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Probably not a good idea to jack up on differential.
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Old 06-30-16, 09:39 PM   #9
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Quote:
its not leak, and it can't be
Perhaps on your car, but his fluid change was nearly 50k miles ago.

Quote:
Probably not a good idea to jack up on differential.
why not? That is the location provided in the manual as the jacking point on the rear.
Section 4.3 Do it yourself maintenance. pg 267, in my pdf manual.
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Old 07-01-16, 03:39 AM   #10
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Still have not had the chance to Jack it back up and clean it. Busy with work and all. Will try to do it this weekend.

And yes, jacking it up on the differential is what I understood from the manual also.
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Old 07-01-16, 04:24 AM   #11
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Quote:
Originally Posted by MWIS350 View Post
Probably not a good idea to jack up on differential.


Why not ? Do you even jack bro ?
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