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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 08-21-2010, 10:43 PM   #1
ITGuy11
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Rattle noise when engaging the clutch M6

When I engage the clutch at low speeds I get a rattle and shaking noise that seems like it is coming from the transmission when unloading the drivetrain.

Example driving 12mph in first gear, fully press the clutch and I hear and feel a rattle from the transmission. The sound is very audible from inside and outside of the car. Car has done this from day one and now has 730 miles on it. This sound is annoying and embarrassing.

Any suggestions before I contact the dealer? I don't want them to claim the noise is because of my MGW shifter. The noise was present with the stock shifter when I drove the car off of the lot.
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Old 08-21-2010, 11:03 PM   #2
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I noticed the exact same thing today and my dad heard it from outside the car and said it isnt right. my car is 100% stock, guess a trip to the dealer is in order
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Old 08-21-2010, 11:17 PM   #3
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i had same problem-
crawled under the car and tapped on everything i could till i finally tracked it down.

My Front and Rear O2 sensors on the passenger side of the vehicle had started to loosen up ( just 1 or 2 threads) but was enough to give them some play.

May want to just give them a check-
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Old 08-22-2010, 09:54 AM   #4
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I know the O2 sensors are tight, cause I installed them in my headers. This is much more than just a little rattle sound, you can feel it. It almost feels like the transmission mount is broken, but it looks okay.
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Old 08-22-2010, 01:41 PM   #5
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It's just the inertia from the drive line. It happens on the V6 as well. Usually at low speeds (1st or reverse) when clutch pedal is depressed quickly. According to the dealer...that is standard operation on our vehicles.
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Old 08-22-2010, 08:21 PM   #6
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Ya, I've got the same noise. Drivetrain clunk.
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Old 08-22-2010, 08:40 PM   #7
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It's just the inertia from the drive line. It happens on the V6 as well. Usually at low speeds (1st or reverse) when clutch pedal is depressed quickly. According to the dealer...that is standard operation on our vehicles.


I can't believe this noise and vibration is normal coming from a new car. I have seen cars with manual trans and higher ratio rearends cause a shimmy when releasing the clutch. But what you are describing sounds like either a dry throwout bearing or u-joint issue. I am no mechanic and certainly not an expert on Gen 5's, but what you describe doesn't sound like an acceptable situation for a new car (unless it was hammered hard doing burnouts). Even with exceptional quality control (as GM has) there can be infantile failure in a batch of parts or even a singular unit. If the dealer you visit does lip service to your problem you may have to take it to another dealer who has a good drivetrain tech (preferably one that owns a Gen 5!). I hope that sounds reasonable to the experts in Camaro5!
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Old 08-22-2010, 08:46 PM   #8
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I have 2350 Km on my car and I have no noise or rattle at any speed during up sifting or down shifting.
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Old 08-23-2010, 02:47 AM   #9
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Mine does the same exact thing. While under the car installing the shifter I didn't notice anything unusual.
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Old 08-23-2010, 03:27 AM   #10
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Originally Posted by ITGuy11 View Post
When I engage the clutch at low speeds I get a rattle and shaking noise that seems like it is coming from the transmission when unloading the drivetrain.

Example driving 12mph in first gear, fully press the clutch and I hear and feel a rattle from the transmission. The sound is very audible from inside and outside of the car. Car has done this from day one and now has 730 miles on it. This sound is annoying and embarrassing.

Any suggestions before I contact the dealer? I don't want them to claim the noise is because of my MGW shifter. The noise was present with the stock shifter when I drove the car off of the lot.
Is it making a "clunk" when you lift the clutch pedal or when you depress it? If it's when you lift it it could be do to the IRS's slack when unloaded. If it's when you depress perhaps something is loose. If it doesn't happen when you drive and shift quickly it's most likely do to the slack caused by the slow speed.
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Old 08-23-2010, 06:48 AM   #11
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normal.

Every M6 car I've owned does it, and that has been tons of cars.

The driveline has to have a little play in it. Things like the ring and pinion, gears in the trans.... cannot be bound up tight, they have to have a little backlash. When you have a load on the driveline, and then release it quickly, it can give off some clunks.

Has nothing to do with IRS, all my solid axle Gen IV's did the same thing also.
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Old 08-23-2010, 08:14 AM   #12
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my car only does it when depressing the clutch. i have owned many manual trans equipped cars and never heard anything like this. i could understand the noise if it were when engaging the clutch if the driveline was not preloaded
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Old 08-23-2010, 08:45 AM   #13
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The title should probably say - disengaging clutch, as he says it happens when pushing the clutch in. Decelling with the clutch engaged has the engine braking load on the drivetrain. Pop the clutch in and you suddenly take all that load off the drivetrain and you hear all the clearances clank a bit. Those clearances have to be there, it's normal.

When building a trans or rear diff, you'll see a backlash/clearance spec for all those gears. If they were set up with zero backlash, it would quickly destroy itself.
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Old 08-23-2010, 09:05 AM   #14
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Quote:
Originally Posted by Russell James View Post
The title should probably say - disengaging clutch, as he says it happens when pushing the clutch in. Decelling with the clutch engaged has the engine braking load on the drivetrain. Pop the clutch in and you suddenly take all that load off the drivetrain and you hear all the clearances clank a bit. Those clearances have to be there, it's normal.

When building a trans or rear diff, you'll see a backlash/clearance spec for all those gears. If they were set up with zero backlash, it would quickly destroy itself.
You are correct about the title, however I can't change it... I owned a 4th gen M6 and never had this noise when pressing in the clutch at low speeds. I don't feel that this noise/clunk is normal for a brand new car to make.
I just want some ammunition before I go to the dealer with it. I don't want them to say it is the shifter, cause it made the noise bone stock.
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Old 08-23-2010, 09:24 AM   #15
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I wouldn't mess with going to a dealer, all they are going to do is joy ride your car and say - normal. Corvettes also do the exact same thing.

More noticeable if your turning a bit, and the LS diff has a little drag on it from the clutches grabbing. I have a 90 deg turn into my garage, I hear the clunk everyday when pulling into my garage on the past 10 cars I've bought. Trust me, it's normal.

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Old 08-23-2010, 09:44 AM   #16
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Mine does the same, not very noticeable until around the 1,000 mile mark, very noticeable now. My current theory is the Throwout Bearing, guy I know at the dealer also concurs. It does appear to be a "normal" part of the drveline slack issue, and nothing to worry about.

It is very annoying though.. I have learned to be a little smoother when loading/unloading the drivetrain around parking lots, ie cruise nights, etc, don't want to alarm bystanders!!!
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Old 08-23-2010, 12:56 PM   #17
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Mine made a rattling noise after about 8000 miles in first and second at low speeds, when you depress clutch it would stop, It was not normal and got louder every week. I took to two different dealer's the first said it was normal the second said it was not. They gave me a new tranny after 4 days trying to figure what to do they said it had "numerous issues" and they weren't going to keep me waiting while they figured it out and replaced tranny-NO NOISE. My husband who is a master ASE Tech said his thoughts were it was the Input shaft bearing but they would never confirm that to be the problem but it is definately not normal.
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Old 08-23-2010, 02:26 PM   #18
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I have a ls3 same thing... I think its a joke how loud of a rattle noise it makes but have been told by people on here its normal. If you take it in let us know what they say I am curious. I may take mine in as well.
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Old 09-27-2010, 08:31 PM   #19
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I have had the same issue since my 1SS M6 had 4,000 miles on it, I finally have an appointment with some engineers out of Detroit tomorrow. First off the selling dealership wanted no part of repairing it, so I went to the Cadillac (also GM) a little closer to home. They immediately wanted to figure out what was wrong, GM first wanted a complete clutch kit installed (Absolutely nothing wrong with the Clutch kit), and for the third trip to the dealership, GM wanted to put a heater hose check valve in it (a T.S.B. where some people mistake a Gurgle in the heater core for a clunking noise) Dahhhhhh.... WTF? The Lemon Law clearly gives a manufacturer 4 attempts to repair the same problem, before the manufacturer is obligated to Re-Purchase the vehicle. So tomorrow I am going to suggest just replacing the transmission rather than wasting my time adding a check valve to the heater hose…….
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Old 09-27-2010, 09:32 PM   #20
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I took it to the dealer last week for the rattle noise. I took the tech for a drive and he heard the sound and said that he never heard that noise before. They call me later that day and state that the noise is normal...

So I insisted on driving another SS M6 to see if it makes the noise. They gave me the keys to a brand new 2011 SS M6 with 2 miles on the clock. Guess what, it makes the exact same noise....

I can't believe that this noise is acceptable to GM. The first day I brought my car home from purchasing it my neighbor was outside when I was pulling it up the driveway. The first thing he said was "what the hell was that rattling noise". How freaking embarrassing
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Old 09-27-2010, 11:30 PM   #21
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I took it to the dealer last week for the rattle noise. I took the tech for a drive and he heard the sound and said that he never heard that noise before. They call me later that day and state that the noise is normal...

So I insisted on driving another SS M6 to see if it makes the noise. They gave me the keys to a brand new 2011 SS M6 with 2 miles on the clock. Guess what, it makes the exact same noise....

I can't believe that this noise is acceptable to GM. The first day I brought my car home from purchasing it my neighbor was outside when I was pulling it up the driveway. The first thing he said was "what the hell was that rattling noise". How freaking embarrassing
I started a thread about this issue too and am very frustrated. I ordered this car and waited 3 months to receive it and however happy i am to have it, I feel like I am driving a worn out Ford Fiesta when it makes that awful cheap car noise. Anyone who says this is a normal noise for manual street cars to make obviously has not heard this particular noise. Corvettes do NOT make this noise, neither did the G4 camaros or any other. It sounds like an emergency brake cable slapping up against exhaust or something every time you depress the clutch at slow speeds. This ridiculous chattering is unique to this car and is either a sign of an engineering noise flaw or a malfunctioning system. If anyone feels they have had this noise remedied please let us know the trick. Thanks...
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Old 09-28-2010, 06:47 PM   #22
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I had a very informative conversation with an engineer from the Milford testing/proving facility, who deals with problems on the manual transmissions in the camaro and the corvette. However the conversation was not a lot about the clunking driveline/transmission issues. The most of the conversation about that were different reasons why it could make that noise, but did not offer any remedy for it. I’m very curious why GM has not issued a recall or at least a TSB on the problem, so dealerships will stop saying that is normal driveline tolerances! It might be fine for us to listen to that noise, and think, “I have a 100,000/5 year warranty J”, but the reality is; I wouldn’t go out and buy a used “SS” anything making that noise! The Lemon Law in Michigan Clearly States “If a motor vehicle has any defect or condition that impairs the USE or VALUE of the new motor vehicle to the consumer” the manufacturer is obligated to repair it. So all the people that want to sit back and deal with it, instead of getting it warranty, Good Luck on selling your Camaro someday.
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Old 09-28-2010, 07:21 PM   #23
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My 2010 and now my 2011 make a noise as well if you push the clutch in rapidly at slow speeds.

As said before it is driveline slack and there is just more of it on this design then say a 4th gen.

With practice it is possible to drive slow and avoid the noise.Slowly depress the clutch so the torque release-unload is gradual.I can do it smooth as silk and never a clank.

If you think about it,on the Camaro,there are a ton of load points to make "noise"

Clutch to Input shaft
Output shaft to Driveshaft with" rubber bisciuts" on both ends(to lessen the load somwhat)
Ring and Pinion
Two axle splines on each side.

The clank is one or more of these unloading and loading and "is" normal for this car.
GM engineers probably could have went further to deal with it but didn't to keep costs down.

I had a 2004 Vette M6 and it would clank sometimes as well,but not as bad due to the torque tube "tightening" everything up

As long as your Imput shaft and throwout bearing are good your Camaro is good to go.

Input shaft bearing is easy to test...Makes noise(Whirring) till you push the clutch, then goes away.Moving or not.

Throwout bearing...makes noise and gets louder as you push the clutch.
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Old 09-28-2010, 07:29 PM   #24
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I had the same clunking noise since my car was new. It was greatly exagerated when I installed solid bushings, to the point of becoming unbearable. In my case it ended up being excessive play in the ring and pinion, GM has shown to have a huge tolerance setting up the drivetrain in these cars.
Get underneath the car, grab the driveshaft and twist on it with the trans in neutral. My diff had nearly a 1/4 turn of slack in it which was creating the clunk sound from lash in the ring and pinion. I finally had Unitrax go through the diff and set it up to their specs. Clunk is long gone and my driveshaft only has about 1/16th of slack now.
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Old 09-28-2010, 07:35 PM   #25
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I also get that on mine.

But I noticed that when I step and release the clutch quick and not all the way down it has that sound. But when you push it all the way down gently it doesn't make the sound.
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