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Discussion Starter #1
Been reading a lot about this. Was wondering if this is common to 2004s, 2005s, or both.

Also, how would you describe the whine? Is it a high-pitched metallic sound, sort of like a throw-out bearing? Or something similar to noise coming from the tires?

I've got a 2004 -- and have always thought the tires were exceptionally buzzy -- particularly from the rear. It's really annoying -- and I'd love to get rid of it.

BTW, any dealer contacts who have the TSB, I'd appreciate getting some info on it to help guide my local dealer. Thanks, all. Have a great weekend.
 

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My '05 has a whine that is not audible until around 80mph. Been noticeable since new and first thought it was tire noise but now believe it is originating from the diff. Hasn't gotten worse so at present will just monitor it.

Other owners complain their noise starts at about 45mph which I guess puts it in a different category from mine.
 

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I have an 04 that I noticed whining when I let off of the gas. I didn't hear it under power. I mentioned to my dealer when I had it in for a leak in the brake system and was told that GM is investigating this and had permission to replace my whole rear end assembly. I take it in Wednesday so I will see what they actually do.

On a side note, has anyone heard of the front tires rubbing the strut? They ended up changing the camber and are replacing the tires. It seems that the front alignments on these GTO's are real touchy since this is the second set being replaced due to alignment problems. The first time was right away after taking possession.
 

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my whine

b a-

My whine ween seems to be better since the fluid change in the diff. The tires are noisy and i hope that the Michellin Pilot's that I intend to buy make it better. PM me if you want to go for a ride to compare noise levels. I am in the Pleasanton area.
 

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Diff. noise

I seem to have the noise, with less than 400 miles on my '05. Only drive it now and then. Worst on trailing throttle, disappears when I have foot on the throttle. Definite whine, so to the dealer it will go, just do not know when. Al
 

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Mine has a whine that starts at 40 and continues till 60. Very annoying! The shop foreman at the dealership said this is normal diff. backlash noise that all gto's have. He also said the clunking sound that I get at low speed decelleration is common to high performance vehicles. The clunking comes and goes but the whine is constant. I then contacted GM and they told me that they were aware of this problem and are working on a fix. They gave me two years of free oil changes and tire rotation and said they would tell me when the fix is in. Time frame 6 mo. to a year. I guess I am stuck with a $30,000 high performance whiner till then. :confused
 

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I took mine in to the dealer to have it replaced. At the end of the day, they didn't replace it because they have been instructed to replace all of the mounting bolts as well. It is also calling for a special fluid. I will try to find out what they are putting in it when I finally get it replaced.
 

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This rear end whine issue, is making me nerveous. I have a little over 20k miles on mine and with my luck, I will have this issue right after the 36k mile warranty. I wish GM would just do a recall and fix this, obvious, problem with numerous GTO's.
 

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I have my 05 M6 scheduled for the replacement of the rear end once the assembly comes from Australia. I took my GTO in to the dealer last week because I kept on smelling oil burning in the rear of the car. They put it on the lift and told me I have a leak in the seals on the rear end assembly. They also showed me a DANA report from GM that states all 04,05,and 06 GTO's will have to get the whole rear end assembly replaced eventually. It is fully covered under warranty. I am assuming that Holden will resolve this issue with the upcoming 06's before they hit the showrooms. But, for all of us that own 04 and 05's, we will eventually have to get them replaced. GM should have sent out a recall letter to all of us regarding this issue but they have refused to do so for some reason.

I noticed clunking and whining on my GTO 2 month's after I purchsed it. Some of the mechanics at the dealerships have no clue of what they are talking about. I took mine to one dealer here in Virginia and they did not find anything at all. Even whe they put it on the lift. They didn't even smell the burning oil that was leaking on the exhaust in the rear. So, the next day, I took it to a dealer that is known for quality work and they noticed the current issue with the Goat.

I will try to get the DANA report from dealer very soon, that is if they will let me have a copy, and post it on the forum.

Kannona
 
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Local dealer put a new rear end in my 05 with 3500 miles on it took 2 months to get and gm had pacific instructions not to open pumpkin to box up and send to research and development at dana for the whine on the gtos the problem only accord at 50mph if put another 1500 on new rear and no problems yet.
 

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Pennsylvania Goat said:
After the replacement, the new rear has been absolutely silent. :cheers
any performance difference?? or is noise just gone?? I have the whine also just trying to see if it progressively gets worst or what..
 

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The car seems faster every time I get in it but I think thats normal since I only drive it on the weekends.

So no. No performace difference.
 

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I have about 12,000 miles on my '04 and I get a clunk in the rearend when pulling off in low gear. Especially when the car is cold.

I've heard that GM is backing off replacing all the rearends on GTO's and instead they are just replacing the diff fluid.

Has anyone had or heard of a rearend failing while on the road?
 

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Diff. noise, more

I just took mine out, still has less than 400 miles. Went without the "seatcover" so I could hear better. Noise is loudest when pinion gear and ring gear do not have pressure between them. Not noticeable when accelerating or decelerating, more noise at constant speed. Al.
 

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It's a whiring sound heard ONLY under acceleration (foot on gas). It is not a clunk and if you have it the dealer has to REPLACE IT. These are noisy DANA pinion gears (a known problem by GM and DANA); a fluid change is NOT a fix.
 
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