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Old 02-26-2010, 05:10 PM   #1
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Transfer case leak question

Hello All,
New to posting in the forums, but been lurking for quite some time.. Lots of great info here for sure.
A little background, I picked up a 98 Wrangler SE a few weeks ago. Had a front pinion seal leak which I fixed. This past weekend I Changed oil, transmission fluid, and transfer case. It is not a DD so I took it for a spin today and after crawled under to check on things and saw this leak, I already wiped it before photo shoot (more like seapage) at the rear of the transfer case. See attached pic. My question is do I just disassemble and apply some RTV and tighten it all back up? Also I had a drip on the seal by U-Joint, see second pic. I believe I have seen a write up for replacing this seal, although It showed a tail shaft housing, it does not appear I have one. Could overfilling cause it to seep/leak? Any help would be greatly appreciated!!



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Old 02-26-2010, 05:34 PM   #2
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Overfilling it will normally not cause it to leak. A little leak never hurt anybody it is when it stops leaking that is when you have the issue . I honestly would wait until you want to go to SYE. The SYE will replace all that is leaking, that is if you are going that route.

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Old 02-26-2010, 06:07 PM   #3
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It looks to me like it could be leaking where the speedometer gear housing bolts to the transfer case housing. That's what holds that black thing with the electrical cable going to it. There is an o-ring inside that is often accidentally cut when the housing is replaced after changing the speedometer gear to calibrate the speedometer.

First mark the alignment by scratching the case & speedo gear housing so you can insert & rotate it to the right position after you're done. Then use a 1/2" wrench to remove the bolt that holds that half-circle clip, then pull the clip off & pull the housing out. ATF will not pour out, it doesn't get that high. Inspect the o-ring & if it is nicked, the dealer has them for a buck or two.

I accidentally cut my housing's o-ring years ago while swapping speedometer gears & it took me a while to figure out that it was leaking from this location. Replacing the o-ring fixed that particular leak.

The leak at the output shaft will take a new seal which is not hard to replace.
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Old 02-26-2010, 06:30 PM   #4
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Thanks Jerry! You wouldn't by chance know the part number for the rear output shaft seal would ya? Wouldn't happen to know where I could find a write up to change the seal?
Thanks again
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Old 02-26-2010, 06:36 PM   #5
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The p/n for seals like that are normally pretty easily found at RockAuto Auto Parts where they have a pretty cool online parts finder that doesn't require you know the p/n.
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Old 02-26-2010, 06:39 PM   #6
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OEM oil seal 4798112
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Old 02-26-2010, 06:47 PM   #7
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OEM oil seal 4798112
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Old 02-28-2010, 12:18 PM   #8
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Thanks again guys for the help.. After I was able to get under there and really get a good eye on it, it appears to be seeping from the gasket? I can take my finger nail and kind of rub on the gasket and it seeps. Could I just take the housing off clean up the gasket area and apply RTV? Once you drop the drive shaft and remove the Yoke, is there any retainer clips? or do you just undo the few bolts and knock it loose?

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