Oil Leak Transfer Case rear seal - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 01-08-2001, 11:16 AM
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Oil Leak Transfer Case rear seal

Posted this already but deleted it by accident when trying to edit (ROOKIE)

Have a problem with my 92 yj np231 transfer case rear output oil seal leaking. Replaced oil seal once which seamed to work for a few months but now it's leaking again.
Open to any suggestions or ideas.

Thanks
jim


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post #2 of (permalink) Old 01-08-2001, 01:51 PM
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Re: Oil Leak Transfer Case rear seal

I recall someone else having that problem. He had to replace the seal like 3 or 4 times before it finally sealed up. Is this a cheapo seal? Sometimes discount suppliers don't keep a very close eye on tolerances. Maybe try a different brand of seal...just my $.02....

Tommy B. in AZ -
More Guts than Brains.
post #3 of (permalink) Old 01-08-2001, 09:13 PM
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Re: Oil Leak Transfer Case rear seal

I went thru 3 or 4 before I found one that worked, NAPA was the winner. I eventually got smart and started test fitting them to the drive shaft before I installed them. The NAPA seal fit snug around the shaft, the others were loose.

jerry

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post #4 of (permalink) Old 01-08-2001, 09:22 PM
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Re: Oil Leak Transfer Case rear seal

I'll have to do that as well as the input to the rear axle I've been told that the shop can do it for $150. I'm wondering if this is a easy project to do myself? (I use my truck for work, I only get about two days to work on the truck)

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post #5 of (permalink) Old 01-11-2001, 03:57 PM
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Re: Oil Leak Transfer Case rear seal

It turns out that my drive shaft is undersized to what all the part books (even the Jeep dealer) call for. Took the d/s to a bearing outfit who measured it and sold me a smaller seal with a nice tight fit.
Third and final seal,hopefully!

jim


post #6 of (permalink) Old 01-11-2001, 04:39 PM
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Re: Oil Leak Transfer Case rear seal

That's pretty funky! Glad you let us know, something else for future reference.

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post #7 of (permalink) Old 01-11-2001, 04:43 PM
 
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Re: Oil Leak Transfer Case rear seal

I had the same problem on my NP231, the tranny shop showed me why....the bearing inside the nose cone (looks like a sleeve)was worn and needed to be replaced. It should slip over the drive shaft nice and snug. If it has some play, a new seal will eventually start dripping. Hope this helps.

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