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Old 09-15-2013, 11:43 AM   #1
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how screwed am I?

So after Having Mt 1998 TJ for a few months I thought I should change all my fluids meaning transmission and transfer case. I went and got the right stuff and was shocked to find that my transfer case was full of gear oil..... Any suggests?

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Old 09-15-2013, 12:53 PM   #2
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Not really sure what you want as suggestions since the transfer case if suppose to be full of gear oil....
Or do you mean that it was overfilled? If so how much came out? You should be fine though even if it was overfilled.

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Old 09-15-2013, 12:57 PM   #3
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yeah...not sure what you're wanting.

the tcase is supposed to be filled with gear oil...i'll be doing mine in a week or two.
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Old 09-15-2013, 01:02 PM   #4
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My transfer case (NP231) takes ATF4+, not gear oil....

OP: Find out exactly what yours takes: gear oil or ATF4+. If it is gear oil then you should be fine. It's supposed to be ATF4+, you could probably flush it a few times and be alright...
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Old 09-15-2013, 01:06 PM   #5
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He's got an ax-15 which should be about 3.3 qts of 75w90

redline fluid works great

i personally use amsoil
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Old 09-15-2013, 01:16 PM   #6
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Quote:
Originally Posted by evilmonkey454 View Post
......was shocked to find that my transfer case was full of gear oil..... Any suggests?
As Dwigs suggests, you should be fine. We might need a refresher course in differeneces between transmissions and tranfer cases, though....
Quote:
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My transfer case (NP231) takes ATF4+, not gear oil....

OP: Find out exactly what yours takes: gear oil or ATF4+. If it is gear oil then you should be fine. It's supposed to be ATF4+, you could probably flush it a few times and be alright...
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Old 09-15-2013, 01:22 PM   #7
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the tcase is supposed to be filled with gear oil...
Chain-driven transfer cases including the 231 used in all Wranglers and the 241 used in Rubicons all require ATF. ATF+4 is the official factory recommendation for the transfer case but it is not really that fussy about the exact type of ATF it gets so long as it is a good quality. An automatic transmission is what is fussy about the specific type of ATF it requires.

Only gear-based transfer cases like the older Dana 300 used in some CJs use gear lube.

Fluid type requirements are all carefully described in the owner's manual, it's best to read up on them before changing fluids.
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Old 09-15-2013, 01:28 PM   #8
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three
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Old 09-15-2013, 01:30 PM   #9
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the reason I asked is everything I was finding said to use ATF so I was shocked to find gear fluid
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Old 09-15-2013, 01:37 PM   #10
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Fluid type requirements are all carefully described in the owner's manual, it's best to read up on them before changing fluids.
I do...

My manual states 75w90 as the recommendation for my manual tranny fuild
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Old 09-15-2013, 01:37 PM   #11
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Originally Posted by Owen_TJ View Post
He's got an ax-15 which should be about 3.3 qts of 75w90

redline fluid works great

i personally use amsoil
I had a ax15 and my transfer case says 231 on it which is atf4

Changed all my fluids when i put new motor and tranny in
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Old 09-15-2013, 01:41 PM   #12
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So I got the manual back from my neighbor and transfer case fluid should be Mopar,WTF Plus+4,type 9602 or equivalent fluid. Thanks for all the response but I'm hoping my case will be fine as I have never had a problem before. I put ATF in and hope for the best.
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Old 09-15-2013, 01:43 PM   #13
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So I got the manual back from my neighbor and transfer case fluid should be Mopar,WTF Plus+4,type 9602 or equivalent fluid. Thanks for all the response but I'm hoping my case will be fine as I have never had a problem before. I put ATF in and hope for the best.
U will be fine. I have a 231 and its got atf+4 too- im pretty sure we are okay
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Old 09-15-2013, 01:47 PM   #14
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I would drain and replace with proper ATF, but I also wouldn't worry about it in the slightest. Both lubricate the bearings just the same, the transfer case isn't complicated. I suspect Jeep specified ATF because it's generally cheaper than gear oil. It is also thinner which means it reduces drivetrain drag. ATF might also be better for the pump.

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I do...

My manual states 75w90 as the recommendation for my manual tranny fuild
Cool, the OP isn't talking about the transmission.
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Old 09-15-2013, 01:48 PM   #15
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the OP isn't talking about the transmission.
My fault for misreading...dont be a dick
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Old 09-15-2013, 01:49 PM   #16
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Originally Posted by Owen_TJ View Post
The tcase is supposed to be filled with gear oil...
Quote:
Originally Posted by Owen_TJ View Post
I do...

My manual states 75w90 as the recommendation for my manual tranny fuild
Yes, he was asking about finding gear lube in his t-case and you said the t-case requires gear lube. The t-case requires ATF.
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Old 09-15-2013, 01:56 PM   #17
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My fault for misreading...dont be a dick
Yeah, I figured that, how else would you have liked me to word it to let you know of your mistake?
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Old 09-15-2013, 01:57 PM   #18
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Thanks for all the help. No problem on the miss read. I appreciate all the fast answers.

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