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Unread 04-04-2013, 08:27 AM   #1
1987GW
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Odd chirp/squeal noise coming from 87GW

Hi all,
My 87 GW has developed an odd chirp/squeal noise. It only happens above 5 MPH and doesn't seem to increase with speed. It's not a belt, as I can rev the engine in park and it makes no sound. It only happens under load. I've posted a short soundbite on YouTube (
). Curious as to your thoughts...

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Unread 04-04-2013, 12:54 PM   #2
RockRollin
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Sounds like many things. U-joints are first guess. Could just be dry, but every chirp your losing metal. It will cause heat as well. So if u-joint, may not feel play in the joint if just dry, but it will get warm after chirping a while
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Unread 04-04-2013, 01:05 PM   #3
1987GW
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Quote:
Originally Posted by RockRollin
Sounds like many things. U-joints are first guess. Could just be dry, but every chirp your losing metal. It will cause heat as well. So if u-joint, may not feel play in the joint if just dry, but it will get warm after chirping a while
Are they easy to lube? Grease fittings, etc easily accessible? This is my first GW and am just learning as I go....
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Unread 04-04-2013, 01:40 PM   #4
RockRollin
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Quote:
Originally Posted by 1987GW View Post
Are they easy to lube? Grease fittings, etc easily accessible? This is my first GW and am just learning as I go....
You'll have to look for grease fittings, most do, some don't. If its dry the chirping is rust dust most likely. If you can get them to quite down, it won't last very well. First off try to verify that's what is going on. You may see some reddish dust around the inside of the caps
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Unread 04-04-2013, 08:53 PM   #5
olliehopnoodle
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Motor mounts. Under load the engine shifts just enough for the fan to hit the shroud. Does it do it at cruize speed or only under load?
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Unread 04-04-2013, 09:05 PM   #6
1987GW
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Quote:
Originally Posted by olliehopnoodle
Motor mounts. Under load the engine shifts just enough for the fan to hit the shroud. Does it do it at cruize speed or only under load?
Pretty much just under load that I can tell. Wind noise becomes a factor where I can't determine after a point. Motor mounts expensive?
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Unread 04-05-2013, 12:13 AM   #7
pleontks
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I just had that same noise. It was a ujoint. It was dry, and destroying itself.
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Unread 04-05-2013, 07:45 AM   #8
olliehopnoodle
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ok, I am 'dumb'. The soundbite includes a picture of your truck, not a video. The soundbite has you actually driving it?
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Unread 04-05-2013, 07:56 AM   #9
1987GW
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Quote:
Originally Posted by olliehopnoodle
ok, I am 'dumb'. The soundbite includes a picture of your truck, not a video. The soundbite has you actually driving it?
Yes-recorded sound using my phone, and only way I could figure out how to post it to the forum was to create a video, but that requires a pic...sorry for any confusion....
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Unread 04-05-2013, 10:02 AM   #10
olliehopnoodle
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My bad. I was struggling with why they thought it was u-joints when you were not moving.

With your foot firmly on the brake give it some gas (not moving). This will 'twist' the engine. If you get the sqeek it's the mounts. If you don't it most likely isn't.

Have you done any radiator work lately? Removed/reinstalled the shroud?
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Unread 04-05-2013, 10:44 AM   #11
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Not done anything....will try your recommended "stress test". Seems to make sense.
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Unread 04-05-2013, 10:50 AM   #12
RockRollin
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Quote:
Originally Posted by olliehopnoodle View Post
ok, I am 'dumb'. The soundbite includes a picture of your truck, not a video. The soundbite has you actually driving it?
that had me going for a bit too, wasn't till I heard the wind noise that it came together
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Unread 04-05-2013, 04:06 PM   #13
olliehopnoodle
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Yeah, the wind noise and the leaves not even moving should have been a giveaway.

Sometimes when folks do radiator work they put the shroud on 'wrong'. It's easy to do.

Try the stress test.
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Unread 04-09-2013, 01:24 PM   #14
1987GW
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Quote:
Originally Posted by olliehopnoodle View Post
Yeah, the wind noise and the leaves not even moving should have been a giveaway.

Sometimes when folks do radiator work they put the shroud on 'wrong'. It's easy to do.

Try the stress test.
So just did the "stress test" with no replication of the noises. Oddly, after doing it (first thing I did after backing out), the noises are now gone. 2 things have changed since my last drive that I recorded - 1) the outside temp is now 85F, first warm day in a while. Been in the 40s-70s, and 2) I did the "stress test".

I doubt that it's temp related, unless warm temps loosened up the grease?Perhaps it means that in the process of testing, the engine moved "back into place", thus eliminating the sound? I'm having a lift installed next week, so will have the shop look at the U joints just in case, but find it curious that after a couple months of the sound, that it just stopped...more to follow if they find anything...
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Unread 04-09-2013, 03:52 PM   #15
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Mine is doing the same thing. I think it's the cover on the bottom of the tranny touching the flex plate. I am going to take it off and see what happens tomorrow.

EDIT
Only when it's cold. Only in reverse. I used an old radiator hose and traced it to the cover after all.
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