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Old 05-11-2004, 07:53 PM   #1 (permalink)
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t-case flange leak??

So I pulled off my front t-case flange today to re-drill for a CV pattern, and a bunch of gear oil poured out. Is this a seal problem or what?

Oh yea, it's a 1990 fj62.
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Old 05-11-2004, 08:03 PM   #2 (permalink)
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Quote:
Originally Posted by muddogbob
So I pulled off my front t-case flange today to re-drill for a CV pattern, and a bunch of gear oil poured out. Is this a seal problem or what?

Oh yea, it's a 1990 fj62.

well, there are many who know more than me, but here's my thoughts.

When you pull the flange out, you are removing the sealing surface, as the i.d. of the seal rides on the o.d. of the flange. So, you probably don't have a leak, unless it also leaks with the flange installed. That being said, depending on how many miles you have on there, you might want to do some preventative maintenance (sp?) and replace the seal. Both of my output seals started leaking within a 5 months of each other, with about 360k miles on the truck, don't know if they've been replaced before (although i'm guessing they have).

so, if you've got lotsa miles, might be worth the effort (minimal) to do it now.

hth
-Travis
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Old 05-11-2004, 09:08 PM   #3 (permalink)
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what he said, the flange is the sealing surface. if it didn't leak before you pulled it, and you are gentle when you reinstall it, no worries!
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Old 05-11-2004, 09:14 PM   #4 (permalink)
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No leaks before pulling the flanges. The only thing is that the when I pulled the front d-shaft off, there was some oil trapped between the shaft and the flange. I don't think it's enough to worry about though.

Where would I find a couple of these seals anyway?

THanks
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Old 05-11-2004, 09:21 PM   #5 (permalink)
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false economy not to replace the seal while the flange is off. NAPA has them
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Old 05-12-2004, 10:24 AM   #6 (permalink)
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i beleive like most transfercases, front ouput is a wet seal meaning it has lube so the the front bearing can get some all the time. lube between the flange and d shaft means you were leaking a bit throught the splines.

if no leaky before removal of the flange, reinstall, and clean the splines both on the transfer, and on the flange up with cleaner and shoot a bit of sealer (on the outer most flange splines) around to seal the splines from oozing.
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