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Phantom noise and vibration??

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Old Jul 17, 2010 | 06:33 PM
  #1  
tomtom420's Avatar
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Joined: Apr 2008
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From: lansing, Illinois
Car: 86 Grand National / 90 Formula
Engine: 3.8 V6 / Procharged 5.7tpi
Transmission: 700R4 / 700r4
Axle/Gears: 3.42's / 3.23's
Phantom noise and vibration??

I've been experiencing a weird noise which seems like its coming from the front of the trans or possibly the flywheel. Its most perdominant when the the car is cold and its put into gear, drive or reverse, and makes a noise that sounds like a clanking or slight knocking noise. When I first heard the noise I thought it was my front brakes making a grinding noise but later the noise got louder and found that it was coming from somewhere around the trans. Also I can feel a slight vibration when deccelarating around 35. The noise never gets progressivly louder but it does come and go at different times. Could it be the flexplate coming loose from the convertor or could the noise be coming from the convertor itself? The flywheel is brand new and sfi approved and couldn't have more than 100 miles on it. Please any info would be helpful. Thanks
-tom
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Old Jul 19, 2010 | 03:18 PM
  #2  
tomtom420's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2008
Posts: 65
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From: lansing, Illinois
Car: 86 Grand National / 90 Formula
Engine: 3.8 V6 / Procharged 5.7tpi
Transmission: 700R4 / 700r4
Axle/Gears: 3.42's / 3.23's
Re: Phantom noise and vibration??

bump any info?
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Old Jul 22, 2010 | 11:00 AM
  #3  
tomtom420's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2008
Posts: 65
Likes: 0
From: lansing, Illinois
Car: 86 Grand National / 90 Formula
Engine: 3.8 V6 / Procharged 5.7tpi
Transmission: 700R4 / 700r4
Axle/Gears: 3.42's / 3.23's
Re: Phantom noise and vibration??

Any ideas?
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Old Jul 29, 2010 | 05:14 PM
  #4  
tomtom420's Avatar
Thread Starter
Junior Member
 
Joined: Apr 2008
Posts: 65
Likes: 0
From: lansing, Illinois
Car: 86 Grand National / 90 Formula
Engine: 3.8 V6 / Procharged 5.7tpi
Transmission: 700R4 / 700r4
Axle/Gears: 3.42's / 3.23's
Re: Phantom noise and vibration??

Help!please..
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Old Jul 29, 2010 | 05:38 PM
  #5  
86 LT1's Avatar
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Joined: Mar 2010
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Re: Phantom noise and vibration??

Did you check converter bolts didnt come loose, seen that already or U-joint
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Old Jul 30, 2010 | 11:52 PM
  #6  
meth64's Avatar
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Joined: Feb 2009
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Re: Phantom noise and vibration??

possible busted/cracked fly wheel
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