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Old 03-01-2010, 10:55 PM   #1
Join Date: Feb 2010
Posts: 7
Transfer case leaking how to fix?

NP 231 Leaking were the two halves come together. Is there a gasket between the two. If no how do i fix it? Do you have to drop the whole case or can you just back the bolts off and slide it back enought to spread rv seal in there

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Old 03-01-2010, 11:04 PM   #2
brent in az's Avatar
Join Date: Feb 2010
Location: Verde Valley, AZ
Posts: 421
Anytime a t/c leaks you have to rebuild it. I would not recommend spreading it and RTV-ing. If your gears are fine a rebuild is inexpensive. Has to be dropped and fixed.

I don't think an RTV fix is worth your life.

I am rebuilding a D20 on an older jeep because of this leak and outfitting it with a twin stick conversion.

If it can't hold fluid--I don't know. This is my instinct from being around jeeps---but instinct is always BS when someone knows a better way. Looking forward to your other responses.

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Old 03-01-2010, 11:08 PM   #3
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Location: beach park, il
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i've removed, disassembled and resealed many transfer cases. no need to replace any parts just because of a leak where the case comes together. if parts are worn its obviously the best time to replace them.

you do have to remove the case, and you do have to disassemble, clean surfaces, reseal and reassemble the entire case. and it is just sealed with rtv where the cases come together, there will be a couple output seals you'll need as well, and iirc a seal on the back of the trans and the front of the t case you may as well replace at the same time.
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