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Unread 12-18-2008, 06:27 AM   #1
fletcher1268
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1998 ZJ 
 
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98 GC strange whistling sound when accelerating

I've looked through a ton of threads on here about strange noises, but I haven't found one with the issues I'm having. I have 98 GC 4x4 with 5.2, a 2" lift and 31" tires. It has 107K. I've owned it for about 2 months. When I'm in park I can accelerate and the engine sounds great. When I'm on the road and I accelerate, there is a tonal whistle that sounds like it is coming from the drivers side engine area. I've made several long distant trips and the sound always seems to go away when I'm not accelerating. Anyone have any ideas or experienced this problem before?

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Unread 12-18-2008, 10:09 AM   #2
wyattarnall
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do you think it could be coming from the speaker? a short in your speaker wire can make that sound, but you would think it would happen even when in park too.
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Unread 12-18-2008, 10:11 AM   #3
wsar10
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or rather a ground issue. (if you here it through the speakers)
or could be a tranny sound.
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Unread 12-18-2008, 10:11 AM   #4
fletcher1268
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No, I've turned the stereo off and it's still makes the noise.
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Unread 12-18-2008, 10:15 AM   #5
wyattarnall
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does anyone own a jeep that doesn't make strange noises?
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Unread 12-18-2008, 10:17 AM   #6
fletcher1268
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I'm pretty sure this has something to do with the drive train as it only happens when I'm driving it.
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Unread 12-18-2008, 10:49 AM   #7
WJChris
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could be a bad carrier bearing
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Unread 12-18-2008, 12:04 PM   #8
fletcher1268
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I found this on a website. "A howl or whine during acceleration over a small or large speed range is usually caused by worn ring and pinion gears or improper gear set up."
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Unread 12-18-2008, 02:22 PM   #9
jonnn313
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ive got a 98 5.9, does the same thing, doesnt bother me that much, it only does it every once and a while, like from a stand still, 0-60, but i dont think it does it when im already in motion
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Unread 12-19-2008, 06:23 AM   #10
fletcher1268
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How long has it been doing this jonnn?
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Unread 12-19-2008, 06:27 AM   #11
kc8ztw
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mine started doing it when i put in a high flow air filter (K&N). its like air whistling through the intake or the air filter. the reason it might not be doing in in neutral is cause when your revving your engine in neutral it doesn't require that much gas/air to get it going but when your going down the road its taking in alot more air when you got your foot down.
also our 415 v10 ford in out motorhome does it after we put a K&N in that too.
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Unread 12-19-2008, 06:39 AM   #12
fletcher1268
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That makes sense. I have two K&N's on mine....I hope that's what it is. Didn't think about it not doing it when there wasn't a load on it.
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Unread 12-19-2008, 06:52 AM   #13
Phil Gerard
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Try tightening down your carburetor. You may have moved it or loosened it when installing the K&N and air is getting in under it through a thin space casing a reed like whistling. Ask me how I know - I have a spacer under my carb and it wears out and whistles under acceleration until I replace it.
Good Luck!
Phil
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Unread 12-19-2008, 07:06 AM   #14
fletcher1268
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Thanks for all the suggestions. This last one makes me wonder if this is it. That's exactly what sound mine is making
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Unread 01-13-2009, 06:30 AM   #15
jonnn313
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its be doing it ever since i got it, like a month ago, and ive put 2000 mi on with no problem, but i think the tranny is going, so im gonna put some sealers and chage the fluids in it. any other advise to keep the transmission from giving out?
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