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Old 01-01-2012, 06:19 PM   #1
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I think my front differential and oil pan are leaking... pics

So I was under my Jeep the other day, and I noticed a lot of wetness in places where they shouldn't be wet

Here's my front differential


and this is the bottom





And then my oil pan




Any thoughts?

Thanks!

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Old 01-02-2012, 02:12 PM   #2
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bump

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Old 01-02-2012, 03:14 PM   #3
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Pinion seal?

I had mine replaced for $200. Included the new seal and new diff fluid.

Learned after the fact it's not hard to tackle your self.
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Old 01-02-2012, 09:03 PM   #4
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Pinion seal?

I had mine replaced for $200. Included the new seal and new diff fluid.

Learned after the fact it's not hard to tackle your self.
ouch! $200 doesn't sound nice... I guess I should do some research on how to replace it yourself, if that's what it is...

but its weird b/c obviously there's a leak at the pack, which could be the pinion seal, but then it looks like its leaking out the front in those three spots too
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Old 01-02-2012, 09:13 PM   #5
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Spray the area with some brake cleaner. Then watch and see which direction the leak is coming from. I would say the one is a pinion, the pan leak, might just need a new seal or a bolt snugged. I would also check the diff fluid level.. should be just below the fill plug.
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Old 01-02-2012, 09:15 PM   #6
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Quote:
Originally Posted by jstone326

ouch! $200 doesn't sound nice... I guess I should do some research on how to replace it yourself, if that's what it is...

but its weird b/c obviously there's a leak at the pack, which could be the pinion seal, but then it looks like its leaking out the front in those three spots too
Gasket itself? Actually just a RTV seal.
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Old 01-02-2012, 09:24 PM   #7
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Gasket itself? Actually just a RTV seal.
huh?
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Old 01-02-2012, 09:27 PM   #8
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Quote:
Originally Posted by jstone326

huh?
The gasket between the diff cover and the body of the diff is just rtv seal so you replace it for the cost of diff oil and like 4 bucks or the new rtv. So less than 15.
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Old 01-02-2012, 09:31 PM   #9
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The gasket between the diff cover and the body of the diff is just rtv seal so you replace it for the cost of diff oil and like 4 bucks or the new rtv. So less than 15.
gotcha... so I just take off the diff cover, put on some new sealant, and replaced the gear oil?
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Old 01-02-2012, 09:38 PM   #10
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http://4x4xplor.com/diff-service.html

One of those cheap bottle pumps from Napa will help also
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Old 01-02-2012, 09:40 PM   #11
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Jeep Axle Differential Fluid Change Service

One of those cheap bottle pumps from Napa will help also
Thanks!... that's funny, cus I was just looking at 4x4xplor at a bunch of the other writeups... their awesome! I used it the first time I did my brakes, and it made it real easy!
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Old 01-02-2012, 09:44 PM   #12
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Does anyone know of a good writeup for replacing the pinion seal? I have the service manual, but its not that clear...
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Old 01-02-2012, 09:44 PM   #13
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Quote:
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Thanks!... that's funny, cus I was just looking at 4x4xplor at a bunch of the other writeups... their awesome! I used it the first time I did my brakes, and it made it real easy!
Agreed,

What would we do without the Internet
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Old 01-02-2012, 09:45 PM   #14
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Agreed,

What would we do without the Internet
idk, probably die
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Old 01-02-2012, 09:51 PM   #15
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idk, probably die
Stuck not getting to work
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Old 01-02-2012, 09:53 PM   #16
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Stuck not getting to work
lol!
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Old 01-02-2012, 09:58 PM   #17
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Does anyone know of a good writeup for replacing the pinion seal? I have the service manual, but its not that clear...
The Haynes repair manual procedure is the way to go in my opinion. It's pretty straight forward and makes sense. You really don't want to over tighten a pinion nut.
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Old 01-02-2012, 10:01 PM   #18
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The Haynes repair manual procedure is the way to go in my opinion. It's pretty straight forward and makes sense. You really don't want to over tighten a pinion nut.
really?? Because I've found it to be a horrible repair manual, really confusing and also the problem is that it tries to cover a pretty wide range of models, but I haven't looked at that particular write up... though then again, I just realized I have the Chilton's, not the Haynes, but I thought they were pretty much the same
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Old 01-02-2012, 10:06 PM   #19
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really?? Because I've found it to be a horrible repair manual, really confusing and also the problem is that it tries to cover a pretty wide range of models, but I haven't looked at that particular write up... though then again, I just realized I have the Chilton's, not the Haynes, but I thought they were pretty much the same
Yes, I can agree on both books being crappy, but this procedure is the best I found after searching the Internet for a procedure myself. I'm having the same issues with oil leakage as you, just waiting for spring to tackle them.
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Old 01-02-2012, 10:08 PM   #20
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Yes, I can agree on both books being crappy, but this procedure is the best I found after searching the Internet for a procedure myself. I'm having the same issues with oil leakage as you, just waiting for spring to tackle them.
oh okay... that's the first time I've heard anyone recommend the Haynes ... but I'll definitely check it out...
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Old 01-02-2012, 10:15 PM   #21
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http://4x4xplor.com/diff-service.html

One of those cheap bottle pumps from Napa will help also
Yea or do it like me with a long funnel and spill it everywhere
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Old 01-02-2012, 10:17 PM   #22
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Yea or do it like me with a long funnel and spill it everywhere
lol.. aren't most gear oil bottles designed to make it easy to fill it just using the bottle?
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Old 01-02-2012, 10:48 PM   #23
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lol.. aren't most gear oil bottles designed to make it easy to fill it just using the bottle?
I'm referring to the rear diff and if you ever tried fillin one you'll know why haha. Gas tank gets in the way. Pretty badly.
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Old 01-03-2012, 07:09 AM   #24
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I'm referring to the rear diff and if you ever tried fillin one you'll know why haha. Gas tank gets in the way. Pretty badly.
Oh gotcha... well I haven't tried, but I can see how it would!
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Old 01-03-2012, 07:52 AM   #25
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a trick you can use when things like gas tanks are in the way, is to get a section of clear plastic hose that fits over the end of the bottle. how ever long you need to make it work. something ive done many times. just slip the house in the fill hole on the diff, and hold the bottle up. for even lazier filling, you can zip tie the bottle to something to hold it in place, and punch a hole in the bottom of the bottle and go eat a samich as the bottle drains into the diff.
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Old 01-03-2012, 08:09 AM   #26
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a trick you can use when things like gas tanks are in the way, is to get a section of clear plastic hose that fits over the end of the bottle. how ever long you need to make it work. something ive done many times. just slip the house in the fill hole on the diff, and hold the bottle up. for even lazier filling, you can zip tie the bottle to something to hold it in place, and punch a hole in the bottom of the bottle and go eat a samich as the bottle drains into the diff.
That's a good idea... is there a specific amount of oil that you're supposed to put in? Like, is it just 1 or 2 bottles? Or is it just when it reaches the hole?

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