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rear end loud noise

This is a discussion on rear end loud noise within the GTO forums, part of the Vehicle Specific category; Hey guys, last couple days, when my car gets warmed up, driving down the road, there is a random popping ...

  1. #1
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    rear end loud noise

    Hey guys, last couple days, when my car gets warmed up, driving down the road, there is a random popping in the rear end, stoping and starting again does it real bad. its very loud and can actually feel it sometimes. any idea what it is. read a few things saying to change the fluid out, any other advice would be great.

  2. #2
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Dead/dieing 10-bolt. Time for a 12-bolt or a 9in.
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  3. #3
    Your friendly policeman FinZ28's Avatar
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    Are you sure the noise is from the housing itself, and not a suspension-related issue? I'd start checking suspension components like LCA's, Panhard rod, sway bar and so on. I'd also check where the torque arm mounts to the rear-end.
    Last edited by FinZ28; 08-09-2012 at 05:56 PM.
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    Former Mopar Man 2002ssslp's Avatar
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    Smiles for 9.5 Years cammed goat's Avatar
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    We need more info. Such as:

    Mileage
    Is it a popping noise? Or a clunking noise?
    Is the rear end howling while driving?

    You could have a bad/worn cradle bushing or differential bushing or U-joint that is transmitting the noise into the cabin. Put the car on a lift and change out the fluid and get back to us. Remember 75-140 SYNTHETIC with some friction modifier added to it.

    Another thing: Is the rearend leaking where the drive shaft goes in? Around where the half shafts go in? Check your half shaft bolts as well.

  6. #6
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    Its got 65k miles on it, and its more of a popping sound. had it up on the lift earlier today, and didnt see any leaking as far as i could tell. as far as the howling, and i have not heard any whining or howling when driving. ill be doing the fluid this weekend, and ill post up if anythign changes.

  7. #7
    Smiles for 9.5 Years cammed goat's Avatar
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    Ok. Keep us posted.

  8. #8
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    after a rough weekend, finally got to get the fluid changed today. drove it for a good 30 min, and it seems everything is fine, thank goodness i dont need to replace the rear end. thanks for the help guys.

  9. #9
    Smiles for 9.5 Years cammed goat's Avatar
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    Ok. Good to hear. Give us a shout if you need anything else. Sounds like your rearend fluid was breaking down causing the clutches in the diff to chatter.

  10. #10
    Member pmolina0436's Avatar
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    Quote Originally Posted by cammed goat View Post
    Ok. Good to hear. Give us a shout if you need anything else. Sounds like your rearend fluid was breaking down causing the clutches in the diff to chatter.
    I have a similar problem as well..I have changed my diff...oil and still the same...mine is more like a thud...I can certainly feel it...coming to a stop...sometimes I feel it from the rear and sometimes from the front...I always thought it might be. Something with the transmission cause I. Feel the thud sometimes when it downshifts..clueless on what could be causing it..
    A mechanic told me it could be the rear shocks...changed those out...and th same thud...anyone know what it can possibly be?

  11. #11
    Senior Member Too Fast's Avatar
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    Quote Originally Posted by cammed goat View Post
    We need more info. Such as:

    Mileage
    Is it a popping noise? Or a clunking noise?
    Is the rear end howling while driving?

    You could have a bad/worn cradle bushing or differential bushing or U-joint that is transmitting the noise into the cabin. Put the car on a lift and change out the fluid and get back to us. Remember 75-140 SYNTHETIC with some friction modifier added to it.

    Another thing: Is the rearend leaking where the drive shaft goes in? Around where the half shafts go in? Check your half shaft bolts as well.

    Do the GTOs use 75-140?

  12. #12
    Member SuperSSguy's Avatar
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    Quote Originally Posted by pmolina0436 View Post
    I have a similar problem as well..I have changed my diff...oil and still the same...mine is more like a thud...I can certainly feel it...coming to a stop...sometimes I feel it from the rear and sometimes from the front...I always thought it might be. Something with the transmission cause I. Feel the thud sometimes when it downshifts..clueless on what could be causing it..
    A mechanic told me it could be the rear shocks...changed those out...and th same thud...anyone know what it can possibly be?
    U-joints maybe? anyone else?????

  13. #13
    Smiles for 9.5 Years cammed goat's Avatar
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    04-06 GTOs run 75-140 and I believe a pint of friction modifier as required by GM. I believe GM has since discontinued the friction modifier but there is something called TRU GEAR by, I believe, CRC.

    Pmolina- have you checked the rubber bushings that connect the driveshaft to the trans and diff?

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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Quote Originally Posted by Smittro View Post
    Dead/dieing 10-bolt. Time for a 12-bolt or a 9in.
    oops,,its a gto my bad..

  15. #15
    Member AKA Speedy's Avatar
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    Quote Originally Posted by SuperSSguy View Post
    U-joints maybe? anyone else?????
    I had a very similar problem... turned out it was a twist in my passenger half shaft. barely noticeable without a thorough inspection. replaced it and everything has been fine since.

  16. #16
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    those sucky gto driveshafts. i put in a solid driveshaft in my 04 gto. what a difference it made.

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