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Howling coming from rear

This is a discussion on Howling coming from rear within the General Help forums, part of the LSx Technical Help Section category; I've got what seems like a howling sound coming from what I think is my rear. I did a break ...

  1. #1
    Spaz is My Mentor SMWS6TA's Avatar
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    Howling coming from rear

    I've got what seems like a howling sound coming from what I think is my rear. I did a break job last week and I only driven it twice since. Both times when I get above 50 it starts to come and go. At 70-80 it becomes more constant. I've done several hard braking and have not had any grinding or pulling so I not sure if it's a break issue.


    Ideas:

    1) Brake Caliber is sticking? (I'm going to check this first.)

    2) Rear is fixing to go boom?

    3) Wheel hub or bearings?

    4) Something else?

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    None Shall Pass Knight's Avatar
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    I take it the car did not make the noise before the brake job? If not, I would be suspecting the brakes.

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    Spaz is My Mentor SMWS6TA's Avatar
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    Update, I was looking around underneath and a walk around looking for leaks, stuff hanging.

    My rear wheels look almost solid black from break dust. Both sides. I'll jack it up this weekend and see what goes.

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    Smiles for 9.5 Years cammed goat's Avatar
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    Check your brakes. And if they are fine, then your rear is letting you know it is time to replace it.

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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Quote Originally Posted by cammed goat View Post
    Check your brakes. And if they are fine, then your rear is letting you know it is time to replace it.
    Agree,

    could be axle walk..

    Also check the calipar pins are'nt hanging up or frozen..

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    Spaz is My Mentor SMWS6TA's Avatar
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    wouldn't I feel that (axle walk)? I get no shimmy or vibrations at all. That's what is so weird.

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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    wouldn't I feel that (axle walk)? I get no shimmy or vibrations at all. That's what is so weird.
    You may or may not even notice.. It would likely depend on the extent of the end play.. That's why I says check your brake pins...
    Stupid things love to hang up or freeze.. Low temp grease will boil right out under hard braking even on the rear calipars..

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    Senior Member JayTA98's Avatar
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    did you adjust your e brake? if not then check the pins 1st like mentioned. what exactly you replace in the BRAKE job. Did you took off the master cylinder cap when you back off the calipers?
    Last edited by JayTA98; 06-10-2011 at 09:42 AM.

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    Spaz is My Mentor SMWS6TA's Avatar
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    No I didn't take the cap off.

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    Electrical Engineer KMdef9's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    No I didn't take the cap off.
    Might extra pressure in your brake system b/c of that.

    Otherwise, I was thinking hub, but those make more noise when turning as well, at least in my experience.

  11. #11
    Spaz is My Mentor SMWS6TA's Avatar
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    Take cap off and bleed system?

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    Electrical Engineer KMdef9's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    Take cap off and bleed system?
    I would just take it off and see if you get a release of pressure, just my guess.









    I just hoping it's not the "bad" thing for you b/c mine howls like hell at all speeds.

  13. #13
    Spaz is My Mentor SMWS6TA's Avatar
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    The howling is bad enough that I heard it over headers and with the T-tops going 80.


    I'm not sure I'm describing quite right by saying it's a howling sound. More like a rubbing or a dragging sound

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    Senior Member JayTA98's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    Take cap off and bleed system?
    well what happens is that if you dont take the cap off your are forcing that hydralic fluid back into the master cylinder. Since the cap is on and is air tight there is no space to create room for the fluid that needs to come back. I mean it will create room but You can bust the o rings in the master cylinder.

    I will try to take the cap off. Fill to proper level if needed. Then open the bleeder of the back wheels and let it flow for a few seconds. Make sure you dont run out of fluid or you will get air in the system. Re fill to proper level and check them again. I will still check the pins and make sure they are free.

    I did damage a master cylinder once because I didn't took the cap off when i back in the calipers. I destroyed the o rings.
    Last edited by JayTA98; 06-10-2011 at 10:56 AM.

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    Senior Member JayTA98's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    The howling is bad enough that I heard it over headers and with the T-tops going 80.


    I'm not sure I'm describing quite right by saying it's a howling sound. More like a rubbing or a dragging sound
    chock the wheels and put the rear end on stands. put the car in neutral and try to move the wheels by hand. Do you feel them stuck or dragging?

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    Spaz is My Mentor SMWS6TA's Avatar
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    I'll have to do that when I get home. That was my plan to see which wheel was dragging. I'm beginning to think it is the fluid pressure because I did forget to take the cap off. I was in a hurry and doing 2 projects at same time. So yeah I hate to say it I rushed it.

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    Electrical Engineer KMdef9's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    The howling is bad enough that I heard it over headers and with the T-tops going 80.


    I'm not sure I'm describing quite right by saying it's a howling sound. More like a rubbing or a dragging sound
    Is it constant? Meaning always making noise, whether in gear or not? (I can't remember if you m6 or not)

    Otherwise, Jay's suggestion is the best I can think of right now.

  18. #18
    Senior Member JayTA98's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    I'll have to do that when I get home. That was my plan to see which wheel was dragging. I'm beginning to think it is the fluid pressure because I did forget to take the cap off. I was in a hurry and doing 2 projects at same time. So yeah I hate to say it I rushed it.
    did you take the cap after they started dragging or not yet?

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    Spaz is My Mentor SMWS6TA's Avatar
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    Jay's the winner of how stupid can SMWS6TA be today.....


    I just got back from a 40 mile test drive. I think it's fixed, did various speeds and braking and no sound. Thank God!!

    Seems Jay was right, as soon as I open the cap I heard a burp sound and a hiss of air. I can't believe it still, that I forgot such a simple step.



    At lease it's not a rear going out.

  20. #20
    Senior Member JayTA98's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    Jay's the winner of how stupid can SMWS6TA be today.....


    I just got back from a 40 mile test drive. I think it's fixed, did various speeds and braking and no sound. Thank God!!

    Seems Jay was right, as soon as I open the cap I heard a burp sound and a hiss of air. I can't believe it still, that I forgot such a simple step.



    At lease it's not a rear going out.
    Lol don't feel stupid it happens to the best of us.

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