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What's making this noise?

Discussion in 'Early CJ5 and CJ6 Tech' started by Mr Peabody, Jan 19, 2009.

  1. Jan 19, 2009
    Mr Peabody

    Mr Peabody New Member

    North Georgia
    Joined:
    Aug 20, 2003
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    3
    I was thinking that my transfer case was to blame for the whirling and grinding noise coming from the floor. But, when I push in the clutch it goes away. Does that mean tranny? Or can the intermediate gear just whine under load?

    Thanks,
    Mr P
     
  2. Jan 19, 2009
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Sounds like a bad throwout bearing.
     
  3. Jan 19, 2009
    dkg4244

    dkg4244 New Member

    Cape Cod
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    Jan 2, 2009
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    45
    My intermediate shaft and bearing were both toast and made a terrible whine. It went away when load was removed (clutch pushed in). Sounds like an intermediate shaft and bearing to me. They're really easy to replace. You don"t even have to take the transfer case out of the Jeep. I would go with the kit from Novak. Good Luck
     
  4. Jan 19, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Front input shaft bearing?
     
  5. Jan 20, 2009
    joel63cj5

    joel63cj5 loose change

    manchester tn
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    :iagree:
     
  6. Jan 20, 2009
    Brian P

    Brian P Member

    Clarkdale Arizona
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    Nov 24, 2007
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    I just went through a similar situation, The Whirling and Grinding noise in my case turned out to be the T90 going canibal on itself due to lubricant neglect of who knows how many owners. I would pull both the tranny and t-case immediatly and give both a complete tear down and inspection. Because they share lubricant any ground up fragments from either will end up in the other and trash them both. If I would have torn mine down sooner it would have cost allot less to repair.

    As it turned out the cluster gear bearings went, ruined the cluster gear shaft bore and chewed up the case beyond reuse....... the input shaft bearing did not have a cage on the balls anymore, the needle bearings that center the input shaft with the output shaft were severly galled......worn flat like small keystock and twisted around the input shaft pilot, thrust washers were nearly toast and much more.

    I dished out about 3 spoonfuls of ground up case and bearings from the T90 and found about half a teaspoon full of these same shavings packed inside the oil seal of the T-Case front output shaft.

    Dont wait if its making noise. Save yourself allot of grief and $$, Get into it now.
     
    Last edited: Jan 20, 2009
  7. Jan 20, 2009
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Heh, anyway you look at it, you're taking the transmission and transfer case out to fix this.
     
  8. Jan 20, 2009
    kaiser_willys

    kaiser_willys Well-Known Member

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    :iagree: with all post, might as well pull them and see whats going on, and if you dont have the cash to repair it throw a tarp over the jeep and let it sit till you do have the funds;) if you keep running it it will only cost more to fix, or trash it beyond repair:beer:
     
  9. Jan 20, 2009
    Mr Peabody

    Mr Peabody New Member

    North Georgia
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    Sounds like I'll be in for a new adventure. I'm sure I'll have more questions as the teardown starts. Thanks for the help.
     
  10. Jan 21, 2009
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Based on your original description, it could just be the classic sound of a throw out bearing as Sparky suggested. Maybe you'll be that lucky.

    Do the throwout and clutch regardless, if you open it up. Better than going in again later.

    Pete
     
  11. Jan 22, 2009
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
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    The Throwout is not ingauged with clutch out. Not really matter as he has to take system out and apart anyway.
     
  12. Jan 22, 2009
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Yes. IME, the throwout bearing only makes noise when the clutch is depressed.
    It shouldn't be spinning otherwise, unless it's adjusted improperly.
     
  13. Jan 22, 2009
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    So I had that backwards? Huh. Ok.
     
  14. Jan 22, 2009
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    True, technically speaking, a throw-out bearing should ideally only engage when the pedal is stepped on.

    But it has been my experience that a noisy throwout bearing (on it's way to going bad) sometimes is silenced when pedal pressure is applied.

    Pete
     
  15. Jan 23, 2009
    RedWing

    RedWing Member

    Sutton Bay
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    I had a similar noise, not real loud, but out of the ordinary. It turned out that the transfer case was sort of in between 2wd and 4wd. I put it firmly into 2wd and the noise went away. It hasnt happened since.
     
  16. Jan 23, 2009
    Brian P

    Brian P Member

    Clarkdale Arizona
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    One more thing to add to my first post, To go along with the whirling and grinding noise there was also an intermittent squeal at idle ........kinda sounded like a slipping v belt, This squeal would stop when I depressed the clutch. From what I found inside my tranny it was probably the needle bearings in the end of the input shaft starting to go, When I depressed the clutch the input shaft stopped turning and so did the squeal.

    There are allot of possibilities but if the noise goes away when you depress the clutch at idle there is a good chance of internal problems.

    I hope it turns out to be something simple.
     
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