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Old 07-26-2010, 09:14 PM   #1
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NP 231 Oil Seal

OK, this is driving me crazy

I had a leak coming from the rear output shaft oil seal on my t-case. I've now replaced said seal twice, but it's still leaking. I can't seem to get it to seat right. I've been using an old metal travel mug that just happens to be the exact same diameter as the seal to drive it in.

I think the issue is how the seal is seating (or not seating as the case may be) around the outermost lock ring on the output shaft.

Any ideas that anyone might have at all would be welcome. I really don't want to have to keep topping it off every 50 miles. Thanks in advance for the help....

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Old 07-26-2010, 09:27 PM   #2
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what type of silicon u usin?

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Old 07-27-2010, 07:21 AM   #3
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i didn't use any kind of silicone, because I've been under the impression for a long time that you shouldn't with a pressed oil seal.

No other ideas, or no one else with experience on this???
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Old 07-27-2010, 11:18 AM   #4
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post a pic were its leakin
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Old 07-27-2010, 11:44 AM   #5
Knows a couple things...

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Be certain it's not leaking from the speedometer gear assembly where it seats into the side of the t-case. Mine had a small nick in the big o-ring and when it leaked, the wind blew it up higher so it looked like the output shaft seal was leaking.
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