np231 leaking - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 03-13-2001, 12:28 AM
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np231 leaking

my t-case is leaking i tried to replace the oil seal but the damn thing keeps on leaking any ideas would be appreciated. Also eventually i will put on the slip yoke eliminator but not for a couple of years.

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post #2 of (permalink) Old 03-13-2001, 08:24 AM
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Re: np231 leaking

I replaced the seal in mine and it stopped the leak somewhat, still a drip every now and then, was way worse. Was tough to find the correct seal replacement though. There are lots of seals that are close to the size. I'd try another seal, mine was $7 at advanced auto.
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<font color=red>'88 YJ, 4" susp,3" body,35's,283 Chevy V8,TH350,4.11's,D30,D35c</font color=red>
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post #3 of (permalink) Old 03-13-2001, 08:40 AM
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Re: np231 leaking

Are you sure that it is the seal leaking and not the slip yoke itself? The slip yoke is prone to leaking from the inside. This will force fluid out from behind the u-joint. If this is the case, you will have to replace the slip yoke, or remove the u-joint, and re-seal the pressed in steel cup with rtv.

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post #4 of (permalink) Old 03-13-2001, 10:18 AM
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Re: np231 leaking

I took my drive shaft in to the parts supply store and found a seal that fit tight. The seal the parts book showed was actually to big.

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