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Thread: gears in need of oil

  1. #1
    Newbie HAMM's Avatar
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    Default gears in need of oil

    I've never done this before and it sounds like i need to. When i'm in 4th or 5th gear and cruising above 50mph, when i put it in neutral I hear a clicking/ grinding noise. How do i add oil to the transfer case?
    I believe thats where it needs to go. I dont get up to 5th gear very often but when i do i'd like to know everythings ok.

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    It's my understanding that if your oil in your transmission or transfer case is that low...it's already too late and they would have overheated and broken something. I could be wrong (and I imagine that they wouldn't just detonate if you're a little low) but I'm not sure low oil could cause a clicking sound.

    Nevertheless, to add oil to the transfer case: There should be two holes in the back of your transfer case (one drain hole and one fill hole). I don't know why year you have but in mine the two holes are right next to each other (one above the other). You take the fill hole plug out (I needed a hex key) and fill until oil is just coming out of the hole.

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    Land Squid Jeffb_79's Avatar
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    How long has it been since you've changed your trans oil, t-case & diff fluids?

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    Newbie HAMM's Avatar
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    i bought it used 11 months ago... Before that i dont know. But i have not changed that oil. The other oils i have though

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    Newbie HAMM's Avatar
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    The PO "said" he changed everything when he relpaced the engine...

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    Land Squid Jeffb_79's Avatar
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    I know nothing about YJ's, but if it has the NP231 T-Case here is a small write up with pictures:

    http://www.4x4xplor.com/trannyservice.html

  7. #7
    Kick A$$ Jeep Chick georgia's Avatar
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    Its pretty simple, that write up like posted is good to follow. Two holes--drain and fill. You will need a small hand pump to pump the fluid back into it.
    God is Great, Beer is Good and People are Crazy.

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    darwinism at its best irish1371's Avatar
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    just make sure to take the fill plug out 1st. Nothing worse then draining a case to find your fill plug is stuck and you can't refill it
    "Some people wonder their whole lives if they will ever make a difference. Marines don't have that problem." Pres. Ronald Reagan
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    Bobble Head Jeeper trailsnail's Avatar
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    If you are talking about crusing on the streets, then it will be the tranny and not the transfer case. Can't tell you what a good oil will be though. I met one guy that told me about a mobile 1 oil that was nice and thin and worked well in his jeep, and the general opinion on JF is Redline MT90 in the AX15 tranny. I want to still try the redline out and see how it goes.
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    and then.... bigdog's Avatar
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    The fluid pump is a great help. You can find one at any auto parts store for 10 to 15 bucks. It is always a good idea to change the fluid in everything when you first buy it so you have a referance.
    .............................

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