Transfer case leak - through trans brake drum - Defender Source
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  #1  
Old July 1st, 2012, 06:02 PM
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Transfer case leak - through trans brake drum

1994 NAS 90 with 1.222 tcase.

So I've got what appears to be a pretty steady leak coming through the transmission brake drum as is evidenced in the below photo.

Now, I've also got a tcase leak more forward of that (most likely the intermediate shaft or similar). However, with this leak here at the drum it appears more "active". I can literally sit and watch it drip with the car off (and cool, not hot). So it makes me think there's a separate leak perhaps being the transmission brake drum? Is there an output seal for the tcase behind there that's relatively accessible?

Thoughts?
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  #2  
Old July 1st, 2012, 06:04 PM
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Here's the drips that occurred from the drum in the time it took me to post the above:
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  #3  
Old July 1st, 2012, 10:19 PM
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I had the same problem...I had the shop fix it...yeah lazy I know, but there is only so much time!
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  #4  
Old July 1st, 2012, 10:22 PM
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Quote:
Originally Posted by Bill Larson View Post
I had the same problem...I had the shop fix it...yeah lazy I know, but there is only so much time!
So what was the diagnosis / fix / part number (even if you just read the invoice )?
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  #5  
Old July 1st, 2012, 10:27 PM
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dont know the part number offr hand, but I bought them from rovers north. they are now with my spare parts, as I just had British 4X4 order them...no
I didnt read the invoice, but I did sign the credit card slip....i know....its all bad!
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  #6  
Old July 1st, 2012, 10:56 PM
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Did they pull/reseal the entire tcase or was it just one leak you were battling that they fixed without removal?
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  #7  
Old July 1st, 2012, 11:09 PM
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Buy:
1 new rear output shaft seal (rubber)
1 new felt washer
1 new nylock output shaft nut.

Remove rear prop shaft, brake drum, and out put flange. Remove and replace seal. Reassemble with new felt and nylock.

Maybe an hour job, very easy.
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  #8  
Old July 1st, 2012, 11:17 PM
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Is that seal the ICV100000? I *think* that's the one...

How about the felt washer part#? And why replace the nylock (just curious)?

Thanks for your help.
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  #9  
Old July 1st, 2012, 11:27 PM
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I have no idea about part numbers.
The nut has a very important job to do. A new nylock is cheap insurance.
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  #10  
Old July 1st, 2012, 11:39 PM
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Found it...FRC7043 oil seal shown below. FRC2464 felt washer. NY120041L is the nut.
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  #11  
Old July 2nd, 2012, 06:31 AM
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And 4 propshaft nylocks.
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Four wheel drive allows you to get stuck
in places even more inaccessible.

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  #12  
Old July 2nd, 2012, 08:23 AM
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Quote:
Originally Posted by nathanwind View Post
Found it...FRC7043 oil seal shown below. FRC2464 felt washer. NY120041L is the nut.
Anyone know what the size of the nut is? seems like it should be able to be picked up for less than $6!
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  #13  
Old July 2nd, 2012, 09:06 AM
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its MASSIVE

But ive reused my 2x. Im goin to replace it when i do this job after the Xbrake group buy goes through
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  #14  
Old July 2nd, 2012, 09:07 AM
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Same as radius arm, M20 x 2.5
I use class 10, though I expect 8 would be fine. Just be real careful to not over torque.
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  #15  
Old July 2nd, 2012, 09:18 AM
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Quote:
Originally Posted by Antichrist View Post
Same as radius arm, M20 x 2.5
I use class 10, though I expect 8 would be fine. Just be real careful to not over torque.
Thanks! out of curiosity, do you know the torque spec off the top of your head?

Sorry for the somewhat related hijack Lav! I don't have a leaking seal but do have a stripped driveshaft bolt that I need to replace.
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  #16  
Old July 2nd, 2012, 09:20 AM
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Jason/Jeff I have a bag of new nylocs in that size if you guys need one. Ordered several when I did my radius arms.
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  #17  
Old July 2nd, 2012, 09:21 AM
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As a side note, I just checked McMaster and they have the M20 nuts for about $12/pack of 5.
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  #18  
Old July 2nd, 2012, 09:33 AM
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Quote:
Originally Posted by jefferson View Post
Jason/Jeff I have a bag of new nylocs in that size if you guys need one. Ordered several when I did my radius arms.
Thanks for the offer...if this project lags until after the next HH then I may snag a couple. Lav is back in NY now so assume it will be easier for him to pick them up locally
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  #19  
Old July 2nd, 2012, 09:55 AM
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Good hijack actually...only bummer is I'm in NY so can't grab one from you guys.

Would like to know the torque spec too...though I left my torque wrench in VA.
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  #20  
Old July 2nd, 2012, 10:39 AM
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I just got mine at a hardware store for 30 cents each and torqued 'em 'till they were tight.
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