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Old 02-06-2012, 08:27 PM   #1
Join Date: Jan 2012
Posts: 52
new transfer case seal still leaking.?

So I replaced the t case seal. (rear) on my stock 93 yj. 40 and it still leaks a little.. is there a break in period? The yolk that goes in seemed to be in ok shape.... What's the the deal.. its leaking around the shaft.. not the outer seal where it mates the t case.

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Old 02-06-2012, 11:32 PM   #2
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Join Date: Dec 2011
Location: Big Sandy Texas
Posts: 299
Is the fluid leaking yellow in color?

Seriously though it sounds like maybe a little grunge was on the yoke when it slid in or possibly pinched the lip of the seal, maybe a nick on the yoke itself? All the transmission seals I've installed because of a leak were immediately resolved except the few cases where I bunged up the seal sliding the yoke in or the yoke itself had a nick that buggered the new seal.

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Old 02-07-2012, 10:54 AM   #3

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Join Date: Sep 2010
Posts: 546
On my 1992 YJ, I replaced the rear seal on my NP231 because it was throwing fluid onto my exhaust. Once it was replaced, it still leaked. I wasn't sure why because I checked the smoothness of the "shaft" before installation. I wound up doing a SYE and that solved the problem for good. No more leaks and no more nasty smell of burning ATF fluid on my exhaust.

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