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Old 01-06-2011, 09:42 PM   #1
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Help!? Do i need a new seal?? ( transmission)

i took my np231 out to replace it with a working one. when i removed the transfer case..it was rtv'd onto the transmission? is this correct?
i was expecting the transmission fluid to pour out but i spoke to a fellow jeeper and he said his transmission fluid has never poured out. so here is a picture of the back of my transmission ( which i assume is an ax15) i have the 4L 6cyl, stnrd 5 spd. do i need a new seal. if so, what is it called and how do i install it? also one last thing. the new tcase has no double end thread bolts in it, where does one go about finding these? when i install them, i should thread lock them? whats the best tool for tightening them..or should i just use the 2 nut trick





Thank you in advance!


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Old 01-06-2011, 11:47 PM   #2
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Quote:
Originally Posted by Codyak
i took my np231 out to replace it with a working one. when i removed the transfer case..it was rtv'd onto the transmission? is this correct?
i was expecting the transmission fluid to pour out but i spoke to a fellow jeeper and he said his transmission fluid has never poured out. so here is a picture of the back of my transmission ( which i assume is an ax15) i have the 4L 6cyl, stnrd 5 spd. do i need a new seal. if so, what is it called and how do i install it? also one last thing. the new tcase has no double end thread bolts in it, where does one go about finding these? when i install them, i should thread lock them? whats the best tool for tightening them..or should i just use the 2 nut trick



Thank you in advance!
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Old 01-07-2011, 05:41 AM   #3
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I do believe that would be your rear transmission output seal and by the looks of it you should replace it. Pry it out and take the seal to a transmission shop, they should have the seal or will know where to get one. To put it in I would find a piece of PVC pipe the same size as the seal and gently use it and a hammer to tap the new one in.
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Old 01-07-2011, 06:20 AM   #4
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i took my np231 out to replace it with a working one. when i removed the transfer case..it was rtv'd onto the transmission? is this correct?


Yes. I just spent way too much $$$$ having the seals replaced. The dealer told me Chrystler RTV'd those seals from the factory.
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Old 01-07-2011, 09:13 AM   #5
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Yes. I just spent way too much $$$$ having the seals replaced. The dealer told me Chrystler RTV'd those seals from the factory.
My tcase was rtvd to the tranny. Should i re apply?
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Old 01-07-2011, 09:26 AM   #6
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My tcase was rtvd to the tranny. Should i re apply?
Yup
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Old 01-07-2011, 09:33 AM   #7
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My tcase was rtvd to the tranny. Should i re apply?
No, the seal is made at the output and/or input shaft, not where the cases are bolted together. There is not supposed to be any ATF or gear lube in the space between where the transmission and transfer cases are bolted together so there is no RTV used where the two cases are joined together. My bet is the previous owner had a leak and didn't know how to replace the leaking seal which is actually pretty easily replaced.
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Old 01-07-2011, 09:37 AM   #8
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^^What He said^^

I usually go off the "if it was there when I took it apart I'm going to put it there when I put it back together" theory of repair
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Old 01-07-2011, 10:01 AM   #9
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Quote:
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my transmission ( which i assume is an ax15) i have the 4L 6cyl, stnrd 5 spd. do
What year is your Jeep bud?
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Old 01-07-2011, 03:16 PM   #10
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No, the seal is made at the output and/or input shaft, not where the cases are bolted together. There is not supposed to be any ATF or gear lube in the space between where the transmission and transfer cases
x2. Just bolt em together, no gasket or RTV. There is also a small opening at the bottom of the t-case mounting face...which is for drainage of any fluid that gets in that space. You'll need to replace your seal before reinstalling the t-case.
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Old 01-07-2011, 05:15 PM   #11
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What year is your Jeep bud?
98. And thanks everyone!
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Old 01-07-2011, 05:16 PM   #12
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98. And thanks everyone!
Yes you have the AX-15 trans.
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Old 01-07-2011, 07:02 PM   #13
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Yes you have the AX-15 trans.
I cleaned my seal and it seems to be in good shape. No cuts or cracks. I dont see how a seal with a good 1/2" gap to the output shaft keeps any oil in...
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Old 01-07-2011, 07:10 PM   #14
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I dont see how a seal with a good 1/2" gap to the output shaft keeps any oil in...
That gap is to allow the input shaft of the transfer case to fit over the output shaft of the transmission. That seal actually seals around the transfer case's input shaft.
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Old 01-07-2011, 07:35 PM   #15
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That gap is to allow the input shaft of the transfer case to fit over the output shaft of the transmission. That seal actually seals around the transfer case's input shaft.
Duh. Thanks man. I hope one day i can answer peoples questions!
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Old 01-07-2011, 07:41 PM   #16
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Duh. Thanks man. I hope one day i can answer peoples questions!
Could a tcase drop make tge tranny leak?
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Old 01-07-2011, 07:43 PM   #17
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Nope.
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Old 01-07-2011, 07:53 PM   #18
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Nope.
You know, there should be a jeep expert forum. Id fork over the visa for answers even more for instant. Thanks alot man! Still though when i pulled my tcase the tranny wad jacked up pretty high. Close to where it always sits and it leaked like a litre
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Old 01-07-2011, 08:32 PM   #19
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