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Loud Screeching Noise?

Discussion in 'Early CJ5 and CJ6 Tech' started by Cj5dale, May 13, 2022.

  1. May 13, 2022
    Cj5dale

    Cj5dale Member 2023 Sponsor 2022 Sponsor

    Knoxville, Tn
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    Aug 19, 2021
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    Was driving down the road around 50mph.

    started hearing loud screeching noise.

    pulled over, put the Jeep in neutral. Still hearing sound.

    crawled under Jeep and it sounds like it’s coming from the bell housing? Not sure about that though.

    jumped back in Jeep and pressed clutch in and released it. Noise went away.

    started back home and noise started back. If I barely pushed clutch in, noise went away while driving.

    when I needed to downshift to turn onto another road, pressing the clutch fully in makes the noise get worse. Very loud.

    I’m assuming there’s a clutch replacement in my future but thought I’d check with you all to confirm.

    I have a video recording of the noise but not sure I can post it here.
     
  2. May 13, 2022
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Sep 21, 2002
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    First thought is bad throw out bearing. How much free play (pedal adjustment) is there?
     
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  3. May 13, 2022
    Fireball

    Fireball Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Pullman, WA
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    Agree it sounds like the throwout bearing going out.
     
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  4. May 13, 2022
    Cj5dale

    Cj5dale Member 2023 Sponsor 2022 Sponsor

    Knoxville, Tn
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    I can press the clutch pedal in about an inch or so before I start to feel a resistance. But it looks like I can tighten that up some.
     
  5. May 13, 2022
    jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Sheboygan
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    Tighten up the freeplay some first. See if that alleviates the squealing.
     
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  6. May 13, 2022
    Cj5dale

    Cj5dale Member 2023 Sponsor 2022 Sponsor

    Knoxville, Tn
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    I tightened it up like you suggested and that did indeed stop the noise.

    is that a reliable fix for now or do I need to replace the throw out bearing?
     
  7. May 13, 2022
    Cj5dale

    Cj5dale Member 2023 Sponsor 2022 Sponsor

    Knoxville, Tn
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    Spoke too soon. Took it for a longer spin and it started making the noise again.

    maybe I’ll try tightening it a little more
     
    Last edited: May 13, 2022
  8. May 13, 2022
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    An inch of free play is good, there has to be some so the throw out bearing doesn't constantly turn. If your clutch releases fine and you can shift fine as is then the free play is good with an inch of free play.
     
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  9. May 13, 2022
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Of course re-reading this makes the pilot bushing come to mind.
     
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  10. May 13, 2022
    Cj5dale

    Cj5dale Member 2023 Sponsor 2022 Sponsor

    Knoxville, Tn
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    It shifts fine. I haven’t noticed any difference with that. However, the screeching noise is loud but seems intermittent. But pressing the clutch has an affect on the noise. Sometimes it makes the noise stop but other times it seems to make it worse?

    also has the noise in neutral at times.

    I recently replaced my output seal on the tcase but it doesn’t sound like the noise is coming from that far back.
     
  11. May 13, 2022
    PeteL

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

    Hills of NH
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    Throwout.
     
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  12. May 13, 2022
    Cj5dale

    Cj5dale Member 2023 Sponsor 2022 Sponsor

    Knoxville, Tn
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    Thank you all.

    I’ll start doing some research.
     
  13. May 13, 2022
    Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2022 Sponsor

    East Tennessee
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    I agree it sounds like a failing throwout bearing.
     
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  14. May 14, 2022
    Desertdog48

    Desertdog48 Everybody's crazy...it just shows up different!

    Butler Pa
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    Mar 17, 2021
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    X5 (I think) on the throw out brg. The clutch disc and pressure plate may be fine... but if you pull it apart to replace one part I recommend changing the disc,pp,pilot & throw out brg. And don't use Omix-ada junk!
    My 71 is starting to whine too.
     
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  15. May 14, 2022
    Bondo

    Bondo Master General Re-Engineer,...

    Greenfield Me.
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    Ayuh,..... Agreed,..... 'n resurface the flywheel, so ya don't have clutch chatter,.....
     
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  16. May 14, 2022
    duffer

    duffer Rodent Power

    Bozeman, MT
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    Back to Glenn's post #2. If there is sufficient free play, the throwout bearing should not be moving and making ANY noise when the clutch is engaged. I suspect there may be a problem with the bearing riding on the clutch fingers even with an inch of free play in the pedal. Is the return spring pulling the pedal completely up? No free play wears out the bearing quickly and often destroys the clutch fingers. It will all need to come apart. And you need to carefully inspect the linkage. You may have some really wallowed out holes in the bell crank, worn linkage rod, along with loose pivots.
     
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  17. May 14, 2022
    Cj5dale

    Cj5dale Member 2023 Sponsor 2022 Sponsor

    Knoxville, Tn
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    Sounds like my only real option is to drop the transmission and go from there.

    I’ll do some research on how to do that and then post som pics of what I find.

    Thanks again for everyone’s help.
     
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  18. May 14, 2022
    Fireball

    Fireball Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Pullman, WA
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    The transmission/transfercase assembly is pretty easy to drop by pulling the passenger seat/floorboards and using an engine hoist to lower it to the floor.
     
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  19. May 14, 2022
    Andrew Theros

    Andrew Theros Member 2023 Sponsor 2022 Sponsor

    Los Osos, CA
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    If not an engine hoist , at least a transmission jack. The red and white “scissor” type at HF will work well enough to make you glad you have it.
     
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  20. May 16, 2022
    Cj5dale

    Cj5dale Member 2023 Sponsor 2022 Sponsor

    Knoxville, Tn
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    I have been researching and watching videos of how to remove my T14a/D18.

    I ran across a statement somewhere that says you should measure the angle, etc. of the engine and tcase before removing.

    Couple questions:
    1) is that something I need to do?
    2) if so, how do I do that?

    thanks again for the help.

    -Dale
     
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