Results 1 to 20 of 20

Rear End trouble

This is a discussion on Rear End trouble within the GTO forums, part of the Vehicle Specific category; My wife's car is making a thunking sound coming from the rear end when I accelerate hard from a stop, ...

  1. #1
    Army of 1 wooddaniel's Avatar
    Join Date
    Nov 2006
    Location
    Alachua, Fl
    Age
    36
    Posts
    1,733

    Ignition Orange/Black
    2008 G8 GT, 98 Z28 383

    Rear End trouble

    My wife's car is making a thunking sound coming from the rear end when I accelerate hard from a stop, accelerate while turning, and when shifting into 2nd at WOT (Auto car with a stock 4l60E) I took the diff cover off, looks ok I guess, but there are some wierd shiny spots on some of the gears, IE it looks as if it's been wearing funny. The halfshaft coming from the pumpkin on the right side is also loose; there is play in it and I can move it by hand freely. Is there a clip that is internal that holds the halfshaft in place? The U joints appear to be fine as far as I can tell. The left side is tight and cannot be moved back and forth by hand. Any suggestions?

  2. #2
    Universal Pisser Offer Fester801's Avatar
    Join Date
    Oct 2009
    Location
    Grapevine, TX
    Posts
    105

    Torrid Red
    05 GTO M6

    Check the tranny mount. They are usually the culprit. I know it sounds like the rearend, but in my experience that is the first to go.

  3. #3
    Army of 1 wooddaniel's Avatar
    Join Date
    Nov 2006
    Location
    Alachua, Fl
    Age
    36
    Posts
    1,733

    Ignition Orange/Black
    2008 G8 GT, 98 Z28 383

    Quote Originally Posted by Fester801 View Post
    Check the tranny mount. They are usually the culprit. I know it sounds like the rearend, but in my experience that is the first to go.
    But should the halfshaft/CV whatever its called be loose like it is? Do I need new CV Axles is that the issue? My knowledge of IRS is not good.

  4. #4
    Member Texas Jack's Avatar
    Join Date
    Jul 2008
    Location
    Central Texas
    Posts
    675

    Cyclone Grey
    2006 GTO M6

    Are you talking shaft that goes from the wheel to the rear end, if so how much does it move. Jack

  5. #5
    Army of 1 wooddaniel's Avatar
    Join Date
    Nov 2006
    Location
    Alachua, Fl
    Age
    36
    Posts
    1,733

    Ignition Orange/Black
    2008 G8 GT, 98 Z28 383

    Quote Originally Posted by Texas Jack View Post
    Are you talking shaft that goes from the wheel to the rear end, if so how much does it move. Jack
    I can't pull it out of the pumpkin, but it moves about an inch to 1.5.

  6. #6
    Member Texas Jack's Avatar
    Join Date
    Jul 2008
    Location
    Central Texas
    Posts
    675

    Cyclone Grey
    2006 GTO M6

    That is your rear axle shaft and they are weak, have you pulled the rear cover off yet. Sounds like it's failed.

  7. #7
    Army of 1 wooddaniel's Avatar
    Join Date
    Nov 2006
    Location
    Alachua, Fl
    Age
    36
    Posts
    1,733

    Ignition Orange/Black
    2008 G8 GT, 98 Z28 383

    Quote Originally Posted by Texas Jack View Post
    That is your rear axle shaft and they are weak, have you pulled the rear cover off yet. Sounds like it's failed.
    Cover has been off. Insides look fine, and no whining or vibration just the clunking sound. I took the cover off Monday and changed the fluid hoping that would be it. So what do I need to fix this?

  8. #8
    Member Texas Jack's Avatar
    Join Date
    Jul 2008
    Location
    Central Texas
    Posts
    675

    Cyclone Grey
    2006 GTO M6

    It's called an axle stub and East Texas Muscle, and BMR suspension sell performace ones, take a look at those guys and you will understand what is going on. To make sure you will have to take the CV loose from the shaft that goes into the rear and pull it out, and that will tell the story. To pull it out it has a C clip on it.
    Last edited by Texas Jack; 12-04-2010 at 08:13 AM.

  9. #9
    Army of 1 wooddaniel's Avatar
    Join Date
    Nov 2006
    Location
    Alachua, Fl
    Age
    36
    Posts
    1,733

    Ignition Orange/Black
    2008 G8 GT, 98 Z28 383

    Quote Originally Posted by Texas Jack View Post
    It's called an axle stub and East Texas Muscle, and BMR suspension sell performace ones, take a look at those guys and you will understand what is going on. To make sure you will have to take the CV loose from the shaft that goes into the rear and pull it out, and that will tell the story. To pull it out it has a C clip on it.
    Thanks for the help. Damn it I just took it off the jack stands yesterday lol.

  10. #10
    Member Texas Jack's Avatar
    Join Date
    Jul 2008
    Location
    Central Texas
    Posts
    675

    Cyclone Grey
    2006 GTO M6

    No problem, Good luck!

  11. #11
    Army of 1 wooddaniel's Avatar
    Join Date
    Nov 2006
    Location
    Alachua, Fl
    Age
    36
    Posts
    1,733

    Ignition Orange/Black
    2008 G8 GT, 98 Z28 383

    Quote Originally Posted by Texas Jack View Post
    No problem, Good luck!
    Thanks, Im hoping this is the only problem and nothing is wrong with the rear end itself.

  12. #12
    Member Texas Jack's Avatar
    Join Date
    Jul 2008
    Location
    Central Texas
    Posts
    675

    Cyclone Grey
    2006 GTO M6

    Quote Originally Posted by wooddaniel View Post
    Thanks, Im hoping this is the only problem and nothing is wrong with the rear end itself.
    Me too, Maybe it's just the axle stub on that side.

  13. #13
    Army of 1 wooddaniel's Avatar
    Join Date
    Nov 2006
    Location
    Alachua, Fl
    Age
    36
    Posts
    1,733

    Ignition Orange/Black
    2008 G8 GT, 98 Z28 383

    Quote Originally Posted by Texas Jack View Post
    Me too, Maybe it's just the axle stub on that side.
    The noise is most definitely coming from the right side. I just drove the car again a minute ago.

  14. #14
    Member Texas Jack's Avatar
    Join Date
    Jul 2008
    Location
    Central Texas
    Posts
    675

    Cyclone Grey
    2006 GTO M6

    Make sure when you put new fluid in you add the limited slip additive to or it will chatter like crasy, get it from GM, and by the way that stuff smells really bad!

  15. #15
    Army of 1 wooddaniel's Avatar
    Join Date
    Nov 2006
    Location
    Alachua, Fl
    Age
    36
    Posts
    1,733

    Ignition Orange/Black
    2008 G8 GT, 98 Z28 383

    Quote Originally Posted by Texas Jack View Post
    Make sure when you put new fluid in you add the limited slip additive to or it will chatter like crasy, get it from GM, and by the way that stuff smells really bad!
    Shit, I used mobil 1 synthetic fluid that said on the package it was for limited slip is that stuff ok???

  16. #16
    Member Texas Jack's Avatar
    Join Date
    Jul 2008
    Location
    Central Texas
    Posts
    675

    Cyclone Grey
    2006 GTO M6

    I used the GM stuff with RP so I don't know, didn't want to take any chances.

  17. #17
    Army of 1 wooddaniel's Avatar
    Join Date
    Nov 2006
    Location
    Alachua, Fl
    Age
    36
    Posts
    1,733

    Ignition Orange/Black
    2008 G8 GT, 98 Z28 383

    Quote Originally Posted by Texas Jack View Post
    I used the GM stuff with RP so I don't know, didn't want to take any chances.
    Ill buy some of that stuff then. It's all coming right back out anyways.

  18. #18
    Member Texas Jack's Avatar
    Join Date
    Jul 2008
    Location
    Central Texas
    Posts
    675

    Cyclone Grey
    2006 GTO M6

    Hope it goes good for you!!!

  19. #19
    Member derbs's Avatar
    Join Date
    Jun 2006
    Location
    iowa
    Age
    30
    Posts
    276

    IBM
    04 GTO

    Quote Originally Posted by Texas Jack View Post
    It's called an axle stub and East Texas Muscle, and BMR suspension sell performace ones, take a look at those guys and you will understand what is going on. To make sure you will have to take the CV loose from the shaft that goes into the rear and pull it out, and that will tell the story. To pull it out it has a C clip on it.
    BMR doesn't do the axle stubs and axles anymore. BMR is now having Gforce1320 make everything if you can't bet the best join them.

  20. #20
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    I'm going to have mine inspected once I have my pinion seal replaced.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. The Super Bowl is in trouble. Big trouble.
    By 5.0THIS in forum Almost Anything Goes
    Replies: 63
    Last Post: 02-02-2015, 06:20 AM
  2. Cam Trouble
    By 99LsOne in forum Internal Engine
    Replies: 7
    Last Post: 06-04-2009, 08:01 PM
  3. Trouble with rear sway bar
    By One_Bad_TA in forum Drivetrain
    Replies: 2
    Last Post: 03-23-2009, 07:17 AM
  4. NSX Trouble??
    By 1 RedHot TransAm in forum Kill Stories
    Replies: 34
    Last Post: 04-27-2008, 07:05 PM
  5. Trouble In Marineland - Trouble Shooting
    By Ed Blown Vert in forum Stereo and Electronics
    Replies: 0
    Last Post: 01-05-2008, 03:30 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •