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Old 04-07-2007, 06:49 PM   #1
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Please Help! Leaking Yoke!

I have a 90 Sahara with the np231 transfer case. It has a 4" lift, 1 1/2" shackle, and a 3" body lift. My problem is, I am leaking fluid out of the center of the yoke behind the transfer case. I have replaced the rear oil seal and even put in a brand new yoke and it is leaking through the vent hole in the middle of the yoke and soaking the u joint. Any suggestions?

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Old 04-07-2007, 07:29 PM   #2
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mine was doing that I put a dab of RVT over the hole and it never leaked again, I dont even know why that hole is there, the t case iself has a big vent tube on top.

94 YJ,, Warn Rock Sliders,GPS, Flowmaster Exhaust,Cd Player,Hi Lift,7500lb winch,full width Dana 44 front, 9inch Rear,soa,Teraflex supershort sye, 38X12.50-15 swampers, 5.38 gears,Detroit Lockers, Cobra CB, Handthrottle. Built By Me
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Old 04-07-2007, 07:54 PM   #3
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Thanks for the reply

I actually just plugged that hole this morning and now it is starting to leak around the oil seal where the yoke slides into the t case. I just replaced that seal so it shouldn't be leakin from there.
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Old 04-07-2007, 09:39 PM   #4
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if its leaking out of the yoke the t-case must be overfilled with fliud. Was it recently serviced with a fluid change?
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Old 04-07-2007, 11:02 PM   #5
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Old 04-08-2007, 01:24 AM   #6
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I got a spare NP 231 I'm willing to sell
Currently not a Jeep owner.

Taking a break from the "jeep thing"
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Old 04-08-2007, 07:58 AM   #7
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Lightbulb leakey slip yoke

Originally Posted by AzTJ View Post
if its leaking out of the yoke the t-case must be overfilled with fliud. Was it recently serviced with a fluid change?
what he said, that's my vote

I had so much vibration from my set up, (4" lift) I had too enstall the sye kit. That will fix that problem .
With all the lift you have ,you will have to do that too.

91 yj 4banger 4"lift 31's
the red rickshaw
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