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post #1 of (permalink) Old 07-03-2002, 11:04 AM Thread Starter
 
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yj yoke seal leak

89 YJ.NP231 transfer case.I have replaced my yoke seal twice within the last few months and it still leaks.What's the fix for this? Or is it one of those leaks I have to deal with until I do the slip yoke conv? THANX
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post #2 of (permalink) Old 07-03-2002, 11:27 AM
 
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Re: yj yoke seal leak

could be a couple of things. your shaft could be out of balance and distorting the seal. the splines on the slip yoke could be out of tolerance causing a wobble or you could have a burr on the yoke itself. there is also a bushing on the inside of the tail cone, that could be out of tolerance too. any manual tranny shop should be able to replace that bushing when i did my sye kit, i kept my old shaft, and my old tail cone.

the slip yoke of the shaft will most likely have surface rust on it, but the cone is still in good shape. the shaft has been in storage for the last 4 years. they arent doing me any good laying around taking up space in storage. it wouldnt hurt my feelings to get rid of them. i cant say as to the material condition of the shaft, but when i took it off, it was less than 1 year old. i would have to dig it up and take a look at it. but take a look at the few things i mentioned before, and come to a determination. if you know of anyone who would like a spare stock driveshaft, i have one. its not a formal sale announcement, but atleast ive put the word out.
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post #3 of (permalink) Old 07-03-2002, 12:21 PM
 
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Re: yj yoke seal leak

Same problem, turned out to be the bushing inside the cone. A tranny shop fixed it.
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post #4 of (permalink) Old 07-03-2002, 01:55 PM
jersey89yj
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Re: yj yoke seal leak

I also have an '89 that had the same problem. I just put in a new driveshaft with a new yoke. I put in a new seal at the smae time. The leak has stopped completly. I changed the seal twice before and it didn't stop the leak, I would guess I had a bad surface on the old yoke. You might try to polish the yoke surface before you buy a new one.
JT
post #5 of (permalink) Old 07-03-2002, 10:11 PM
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Re: yj yoke seal leak

Some places sell seals that just don't work, the inside diameter is too large and won't seal to the drive shaft. I went through three or four before I got one from NAPA that worked. Make sure you test the next one on the drive shaft before you install it.
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post #6 of (permalink) Old 07-04-2002, 09:00 AM
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Re: yj yoke seal leak

Normally it isn't the seal that leaks, but the yoke in the driveshaft. There is a steel, pressed in plug on the back side, similar to a freeze plug, that is common to leak fluid. The fix is to replace the slip yoke.

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post #7 of (permalink) Old 07-04-2002, 10:53 AM
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Re: yj yoke seal leak

I don't want to sound cheap but I fixed my leaking yoke by putting RTV sealant around the diameter of the pressed plug. It has lasted well over 1 1/2 years and saved me $125.00 can. (A!) for a new yoke.

P.S. Clean area well with solvent first before applying RTV.
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