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Unread 05-03-2011, 10:46 PM   #1
EvolvingWorld
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1995 YJ Wrangler 
 
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need some help as to y this seal keeps going...

i had recently replaced my transfercase output shaft seal and it went again in the same day about an hour after i ran my truck.. what could b causing this problem...????should i lightly sand down my rear shaft and coat it with a gloss paint...????

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Unread 05-03-2011, 11:25 PM   #2
NonRubicon
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No. Sanding won't help, but you are correct in suspecting the slip yoke shaft as the culprit. If the seal is correctly seated and undamaged then the reason you still have a leak is because the slip yoke shaft is worn. The tolerances are very close for the slip yoke and the bearing. Paint won't fix it.

Replace the seal and bearing in the tailcone housing, and the slip yoke - then your leak will go away. While you are at it, might as well replace both rear driveshaft u-joints for good measure. If the slip yoke is worn, it's a good bet the u-joints are too.
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Unread 05-03-2011, 11:31 PM   #3
EvolvingWorld
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thank you, appreciate the post i will check everything out.. and change it out.
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Unread 05-04-2011, 08:03 AM   #4
EvolvingWorld
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When I get the new slip yoke can I coat it with something so it doesn't get that build up on it.....
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Unread 05-04-2011, 09:06 AM   #5
Lemoore-on
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I think there is a bushing in the housing that can be replaced also. I dont have time to look it up right now.
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Unread 05-04-2011, 09:21 AM   #6
Flajeeper1
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Quote:
Originally Posted by NonRubicon View Post
No. Sanding won't help, but you are correct in suspecting the slip yoke shaft as the culprit. If the seal is correctly seated and undamaged then the reason you still have a leak is because the slip yoke shaft is worn. The tolerances are very close for the slip yoke and the bearing. Paint won't fix it.

Replace the seal and bearing in the tailcone housing, and the slip yoke - then your leak will go away. While you are at it, might as well replace both rear driveshaft u-joints for good measure. If the slip yoke is worn, it's a good bet the u-joints are too.
X2. If your seal went in the same day definitely replace the bushing in the tailshaft housing. And absolutely check the U-joints. If you're in question have a local driveshaft shop look at them. Easy to replace yourself.
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Unread 05-04-2011, 09:42 AM   #7
Mean Max
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The bushing in the tailshaft housing is a bronze/brass/copper type bushing. The yoke may be worn, but most likely the softer metal bushing has taken the most beating.

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Unread 05-04-2011, 07:00 PM   #8
NonRubicon
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Quote:
Originally Posted by Mean Max View Post
The bushing in the tailshaft housing is a bronze/brass/copper type bushing. The yoke may be worn, but most likely the softer metal bushing has taken the most beating.
I had assumed the same thing at first when I developed a leak. Replaced both the seal and bushing to no avail - still leaked. Had to put in a new slip yoke to finally stop the leak. I recall a post or sticky here on JF that recommended replacing the slip yoke when you replace the bushing/seal because of the possibility of the slip yoke being worn. I decided to skip that recommendation and found out that my slip yoke was the problem.

Of course, no reason to replace the slip yoke if the problem lies in the bushing. One step at a time.

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