Howl sound at 20 ish and 40ish
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Cadillac Escalade, EXT and ESV Forum - 1999 - 2006 Discussion, Howl sound at 20 ish and 40ish in Cadillac Escalade Forums; Hello - I have an 05 platinum. Recently I have had the front diff, transfer case and trans rebuilt. At ...
  1. #1
    mjwills is offline Cadillac Owners Member
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    Howl sound at 20 ish and 40ish

    Hello - I have an 05 platinum. Recently I have had the front diff, transfer case and trans rebuilt. At 20/40 ish there is still a howl. Drop it in neutral it goes away. Sounds like extreme tire road noise.

    I really don't think it's anything with the rebuild (under warranty if it is).

    The shop checked wheel bearings and they seemed fine. Could they still be bad?

    Could u joints cause this?

    Any other ideas?

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    the cadillac man's Avatar
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    Quote Originally Posted by mjwills
    Hello - I have an 05 platinum. Recently I have had the front diff, transfer case and trans rebuilt. At 20/40 ish there is still a howl. Drop it in neutral it goes away. Sounds like extreme tire road noise.

    I really don't think it's anything with the rebuild (under warranty if it is).

    The shop checked wheel bearings and they seemed fine. Could they still be bad?

    Could u joints cause this?

    Any other ideas?
    Sounds like something with tranny or transfer case considering the noise goes away when in neutral.

  4. #3
    William01's Avatar
    William01 is offline Cadillac Owners Fanatic
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    Re: Howl sound at 20 ish and 40ish

    Quote Originally Posted by mjwills View Post
    Hello - I have an 05 platinum. Recently I have had the front diff, transfer case and trans rebuilt. At 20/40 ish there is still a howl. Drop it in neutral it goes away. Sounds like extreme tire road noise.

    I really don't think it's anything with the rebuild (under warranty if it is).

    The shop checked wheel bearings and they seemed fine. Could they still be bad?

    Could u joints cause this?

    Any other ideas?
    If you dont mind me asking how much did they charge you to do the front diff, transfer case, and transmission done?

  5. #4
    gottaride68 is offline Cadillac Owners Member
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    Re: Howl sound at 20 ish and 40ish

    I'd start with the u-joints....

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    mjwills is offline Cadillac Owners Member
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    Re: Howl sound at 20 ish and 40ish

    @William01 - $3k and that included upgraded trans parts for towing.

    @gottaride68 - I was told to check the u joints and they too would stop making the noise when disengaged from drive. These noise issues are very hard to diagnose as most require a load. Can you explain to me why you are saying the u joints? (I am not a mechanic by any means).

    Could the offset of the gears be off in the front diff?

  7. #6
    mjwills is offline Cadillac Owners Member
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    Re: Howl sound at 20 ish and 40ish

    Any other thoughts on this topic?

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    the cadillac man's Avatar
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    Quote Originally Posted by mjwills
    @William01 - $3k and that included upgraded trans parts for towing.

    @gottaride68 - I was told to check the u joints and they too would stop making the noise when disengaged from drive. These noise issues are very hard to diagnose as most require a load. Can you explain to me why you are saying the u joints? (I am not a mechanic by any means).

    Could the offset of the gears be off in the front diff?
    The u joints are what hold the driveshafts to the transfer case and differentials,
    You will also have wheel bearings in the front that can cause a roaring noise about like a helicopter is above you I know from experience and it almost drove me nuts cause i didn't have much time to fix it on my previous car thankfully I got it changed in time to keep my sanity.

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    osure is offline Cadillac Owners Member
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    Re: Howl sound at 20 ish and 40ish

    Was there a noise before you replaced diff? If not then I would bring it back to them offset will make that noise also.

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    osure is offline Cadillac Owners Member
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    Re: Howl sound at 20 ish and 40ish

    also is there a vibration at 20/40

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    the cadillac man's Avatar
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    Quote Originally Posted by osure
    also is there a vibration at 20/40
    It could be the wheel bearing I know cause my previous car did this and it was one of the wheel bearings bad.

  12. #11
    mjwills is offline Cadillac Owners Member
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    Re: Howl sound at 20 ish and 40ish

    I feel a slight vibration in the foot area on the floor. Minimal in the steering wheel. I just pulled my TT with it and it pulls beautiful but that howl drives me nuts. There was a noise coming from the front diff before - carrier bearing ~ that's how I got started with all this

    I did have a wheel bearing replaced previously and it was a different noise then this, but not all failures will sound the same.

  13. #12
    the cadillac man's Avatar
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    Quote Originally Posted by mjwills
    I feel a slight vibration in the foot area on the floor. Minimal in the steering wheel. I just pulled my TT with it and it pulls beautiful but that howl drives me nuts. There was a noise coming from the front diff before - carrier bearing ~ that's how I got started with all this

    I did have a wheel bearing replaced previously and it was a different noise then this, but not all failures will sound the same.
    The slight vibration can be caused by a wheel bearing I know as I had one fail on my previous car like to went nuts before I got it fixed and it was the passenger side but I could feel it on the driver's side floorboard.
    P.s you won't it in the wheel if it is a wheel bearing.

  14. #13
    mjwills is offline Cadillac Owners Member
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    Re: Howl sound at 20 ish and 40ish

    I stopped at the shop that did the work and they hear and feel it. Next week they are going to put a Timken wheel bearing on there and see if that works (at no cost if that doesn't work). If that's not it they are getting back into the front diff. I'll keep you posted.

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    TLMC is offline Cadillac Owners Member
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    Re: Howl sound at 20 ish and 40ish

    Did you check the rear diff?

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    mjwills is offline Cadillac Owners Member
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    Re: Howl sound at 20 ish and 40ish

    Fixed. Pitted race on one of the pinion bearings. Another rebuild of the front diff under warranty.

    Side note - also needed a new driver wheel bearing. The rotor was seized to the bearing and the rotor was cracked. Added to issues, but main issue was resolved with diff rebuild.

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