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post #1 of 7 Old 11-20-2015, 11:16 PM Thread Starter
Will9119
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1996 ZJ 
 
Join Date: Feb 2012
Location: Kingsport
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Whistle Noise

My Jeep has started making a whistling noise. It generally only starts when traveling above 45 MPH and only happens when I am not accelerating. As soon as I take my foot off the pedal it starts but if I barely even press down on the pedal it stops but then starts again if I let up. Once I come to a complete stop it will usually stop and will sometimes start again and sometimes not. It is very intermittent but is very loud when it happens and is becoming more frequent. It sounds exactly like a tea kettle.

Thanks for any help!

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post #2 of 7 Old 11-20-2015, 11:31 PM
kg6mov
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Front or back? Sounds like a pinion bearing to me.


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1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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post #3 of 7 Old 11-21-2015, 10:42 AM Thread Starter
Will9119
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Sounds like it's coming from the front. It sounds like the noise is coming from under the hood.
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post #4 of 7 Old 11-21-2015, 12:39 PM
kg6mov
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Update the specs for your jeep please. I'm assuming since you have it listed as "V6" that you have the 4.0, which is an I6. What transfer case do you have? Does it have a 2wd mode?


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1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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post #5 of 7 Old 11-22-2015, 02:05 PM Thread Starter
Will9119
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1996 ZJ 
 
Join Date: Feb 2012
Location: Kingsport
Posts: 56
I'm not sure what kind of transfer case I have. How do I find out? Last night when I was driving it started making the noise and still did it for a while when I was in park. Would a piston bearing still make the noise if the Jeep was parked?

Thanks
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post #6 of 7 Old 11-22-2015, 02:34 PM
kg6mov
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What modes do you have on the t-case?

But you're correct, the pinion bearing can't whistle unless you're moving.

So now you're looking for something in the engine bay. Maybe an idler pulley?


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1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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post #7 of 7 Old 12-06-2015, 01:54 PM Thread Starter
Will9119
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1996 ZJ 
 
Join Date: Feb 2012
Location: Kingsport
Posts: 56
Thanks to everyone for the replies. I looked at several different things on this and think I found the solution. I tightened the screw closest to the engine block on my exhaust manifold. When I tightened it, I noticed it was slightly loose and I have not heard the noise since.
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