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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?:confused:
 

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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.
 

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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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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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leakey slip yoke

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.
 
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