Transmissions and Drivetrain Need help with your trans? Problems with your axle?

strange noise by rearend

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Old Jul 8, 2011 | 07:52 PM
  #1  
1roc89z28's Avatar
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strange noise by rearend

u could hear a low wistling noise comming for like the rear end or around there.. anyone have an idea what this could be??? whats making this sound?? thx
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Old Jul 9, 2011 | 12:16 PM
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//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: strange noise by rearend

vacuum breaker/vent on the gas tank.
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Old Jul 9, 2011 | 09:45 PM
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Re: strange noise by rearend

what u mean by that
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Old Jul 10, 2011 | 08:59 AM
  #4  
//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: strange noise by rearend

Originally Posted by 1roc89z28
what u mean by that
that noise you hear is the

vacuum breaker/vent on the gas tank.
cant be more clear than that can it?

if you look under the car, driverside, just in front of the axle where about where the brake line on the chassis changes to the rubber flex hose to go to the axle, there is a white vent fitting there attached to a bracket ont he frame. It vents/bleeds pressure or vacuum from the tank and makes this noise after you turn the car off aster running it.

if its not that, idk what it would be.
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Old Jul 10, 2011 | 11:54 AM
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Re: strange noise by rearend

thx for the help... but u say it does it after u turn it off??? this one does it while on... seems like after i use it for a while for some reason... and only at idle
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Old Jul 10, 2011 | 12:26 PM
  #6  
//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: strange noise by rearend

Originally Posted by 1roc89z28
thx for the help... but u say it does it after u turn it off??? this one does it while on... seems like after i use it for a while for some reason... and only at idle
usually you dont notice it when the car is running
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Old Jul 11, 2011 | 04:50 PM
  #7  
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Re: strange noise by rearend

then im assuming its something else.. since in my case its the other way around... i could only hear it when its on idle....ima record it and here see if u could help
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Old Jul 23, 2011 | 05:45 PM
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From: Lynchburg Va
Car: 1989 RS with T-Tops
Engine: 2.8L TPI Swapped to LT1
Transmission: 7004r auto Swapped to 4L60E
Axle/Gears: Stock Swapped to 3.27 Posi 9 bolt
Re: strange noise by rearend

Could be the fuel pump going bad and making a noise
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Old Jul 26, 2011 | 12:33 AM
  #9  
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Re: strange noise by rearend

realy??????
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Old Jul 27, 2011 | 11:25 AM
  #10  
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From: Lynchburg Va
Car: 1989 RS with T-Tops
Engine: 2.8L TPI Swapped to LT1
Transmission: 7004r auto Swapped to 4L60E
Axle/Gears: Stock Swapped to 3.27 Posi 9 bolt
Re: strange noise by rearend

Yea mine sounded like it was going to rattle its way out the tank. The one in one of my trucks squeeled like a little girl right before it locked up. The last one in my current truck just keep pumping and pumping and never wanted to shut off. Sounds like i have bad luck with fuel pumps, have to think about that for awhile.
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