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Old 02-05-2014, 10:29 AM   #1
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Got Some Leakage

Hey fellow Jeepers!

i walked out to my jeep yesterday and saw that i had some leakage between my brake booster and my master cylinder and on the back end of the axle where the drive shaft enters. Can anyone help. i am hoping to fix it before TDS.
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Old 02-05-2014, 10:39 AM   #2
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The leak with the master cyclinder is something im not sure about. Im sure someone with more knowledge will chime in. As far as the other leak its a pinion seal. Very easy fix

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Old 02-05-2014, 10:44 AM   #3
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This should help

rear pinion seal replacement
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Old 02-05-2014, 11:46 AM   #4
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It looks very minor at both leaks but the only thing thing that can cause your master cylinder leak is a bad seal in the cylinder (assuming you didn't spill some fluid topping off) and the only repair is to replace the cylinder. It doesn't look like your reservior is low so I'm assuming it was topped off recently.

It is a pretty easy DIY if you know how to bleed the master cylinder before install and then the system after the install. Make sure to spray some type of penetrating oil on your bleeders before you start the job.
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Old 02-05-2014, 05:40 PM   #5
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Thanks!
Are there any aftermarket upgrades i can get myself into?
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Old 02-14-2014, 08:27 PM   #6
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I have had no luck replacing the pinion seal. The pinion seal for the 2003 Rubicon is different than my dads 05 sport. I have taken 3 pictures: 1. the front pinion seal on my jeep that i ruined(hoping i can still get it off because it is ripped to shreads) 2. the rear pinion seal on my jeep (thats how the front looked before i destroyed it), 3. the front pinion seal on my dads jeep.

Can anyone help?

BTW replaced the master cyl. and all is good there are no leaks
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Old 02-14-2014, 08:29 PM   #7
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i guess all the pics didnt work...
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Old 02-14-2014, 08:30 PM   #8
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Yep power brake units look a lot different than differentials
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Old 02-14-2014, 08:32 PM   #9
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Better pics what tool did you use a giant can opener? Those edges look pretty jagged and dangerous
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Old 02-14-2014, 08:38 PM   #10
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flat head screwdriverand and a hammer.... the seal would not break lose, so i figured that if i moved the edges out, i would be able to get between the housing and the seal. didnt work, so here i am.
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Old 02-14-2014, 08:50 PM   #11
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You just need to keep working at it. It will come out. Maybe try a little heat on the differential case to soften up any adhesive that might be in there.

I would leave the front alone. It isn't leaking at all.
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Old 02-14-2014, 08:54 PM   #12
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Search thread rear pinion oil seal help it talks of rubi rear and it had a fair amount of sealer that held it in pretty tight but looks like you are on right track just don't damage the recess the seal sits in
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Old 02-15-2014, 12:00 PM   #13
Knows a couple things...

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Is it still driveable? Do you have the right type of replacement seal? I have replaced that type of seal before, it's actually not as difficult as the standard type of seal that comes in non-Rubicon axles.

The seal p/n is SKF 15525, places like NAPA should have it.

If you come to your wit's end, perhaps I can help you with it since we don't live that far apart, I live up in Escondido.

Try prying what is left out with a pair of visegrips, it is only held in place by an o-ring and friction. If you get it out, the new one is just carefully tapped into place. Smear some Permatex Gear Oil RTV (best) or Permatex UltraBlack RTV (very good) around its o-ring to help assure a good leak-free seal.

This is what it looks like...
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Old 02-17-2014, 08:37 AM   #14
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got it! Thanks everyone!

No leaks so far.

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