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

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Old 03-03-2013, 07:06 PM   #1
Morpheusxeno
 
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Clutch Drop Sound

When pushing in the clutch in first gear quickly and low RPMS (1400-2000) I hear this sound of something in the transmission dropping, Is this normal ? it sounds like a golf ball being dropped inside a thick metal box. Usually bounces a few times it sounds like.
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Old 03-03-2013, 07:11 PM   #2
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I hear it before I back in to my garage. I do believe it is normal.
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Old 03-03-2013, 07:28 PM   #3
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Driveline slack?

That can be avoided if the clutch is disengaged when there is no load.
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Old 03-03-2013, 08:15 PM   #4
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The dealer gave me bullentin number 03-07-29-004h manual transmission operating characteristics it goes over basic information, cold operation, gear rattle,neutral rattle, backlash, shift effort, non synchronized gears. So with all that said no matter what noise your car is making they have an excuse for it in this document. I think it's unacceptable for a 40 thousand dollar car to make this sound.
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Old 03-03-2013, 08:38 PM   #5
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It's not the car's fault. Like Comrando said, it's driveline slack. It means the car isn't being driven well...

Don't push the clutch while the driveline is loaded. Consider it a message from your car to you!
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Old 03-03-2013, 08:57 PM   #6
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Yeah, mine does the same thing.....in first gear......no matter how gentle you try to be, it just makes that sound.
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Old 03-03-2013, 08:58 PM   #7
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Backing up I hear another type of sound from the brakes......it's not the clutch....only does it in reverse. Need to find out more about this.
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Old 03-03-2013, 09:02 PM   #8
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Quote:
Originally Posted by Sblann View Post
The dealer gave me bullentin number 03-07-29-004h manual transmission operating characteristics it goes over basic information, cold operation, gear rattle,neutral rattle, backlash, shift effort, non synchronized gears. So with all that said no matter what noise your car is making they have an excuse for it in this document. I think it's unacceptable for a 40 thousand dollar car to make this sound.
It doesn't matter if it's 40,000, or 1,000,000...a manual transmission is operated by the driver. And is subject to human error.

In first gear, with such a tall overall ratio between the engine speed and the wheels...there's a little slack in the drivetrain. Some talk about gear lash when referring to it.

Very normal...with practice and purpose, it can be avoided.
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Old 03-03-2013, 09:02 PM   #9
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Try shifting smoothly and a bit slower. and try pushing the clutch all the way down when making the 1 to 2 shift (i assume this the 1 giving you trouble), what happens to me sometime is that I will shift before pushing the clutch down and you get a thunk (this is you pulling the tranny out of gear with the clutch still engaged), or sometimes I just dont push the clutch down enough. happens a lot if your not careful on the 1 to 2 shift.
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Old 03-03-2013, 09:07 PM   #10
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The drivetrain has an amount of slack in it. When it is loaded the slack is taken up. If you disengage the transmission from the engine while it is loaded, everything will spring back and oscillate. That is what you're feeling/hearing. If you match the input RPM to the output RPM and release driveline pressure slowly, it will not make the noise.

I usually piss my car off when I'm pulling into the garage. I used to do it a lot in parking lots or anywhere slow driving was required. You just have to learn to deal with all of the different loaded drivetrain scenarios and knock them out one at a time.
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Old 03-03-2013, 09:51 PM   #11
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What do you guys mean by being gentle? To go from 1st to reverse I have to stop my car and I'm already creeping down the alley to get to my garage. Right before I stop I press in the clutch and you'll hear that little drop sound.

Are you guys talking about something else?
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Old 03-03-2013, 09:59 PM   #12
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Originally Posted by Mutant Racer View Post
What do you guys mean by being gentle? To go from 1st to reverse I have to stop my car and I'm already creeping down the alley to get to my garage. Right before I stop I press in the clutch and you'll hear that little drop sound.

Are you guys talking about something else?
It sounds like you might be leaving it engaged too long. Experiment letting off the clutch sooner. Sometimes, you can load it, erm..."backwards"? If the engine sputters down below normal idle speeds it will want to spin back up, and so when you release the clutch just before a stop it might make a little rattle sound as it releases that tension.

I discovered that at stoplights...I'd wait just a little too long to depress the clutch at a traffic signal. I don't know if that is your issue or not, though.
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Old 03-03-2013, 10:10 PM   #13
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Had a 78 civic, 1969 camaro, 1989 Subaru, 1986 mustang gt, 1980's ford truck and a 1976 scout international all with manuals and none of these made this drive line slack as loud as my camaro is now. Maybe we're talking about different things but my car is a loud clunk and i did drive other new 2013 camaros from other dealers, ( 3 to be exact) they all did make the same noise but it's a slight clunk and I could make it happen or I could stop it from happening depending on how I drove them I get that (those were tolerable and if mine was like that i wouldnt have a problem with it) but mine is not even close to the sound those made. it is alot louder and is harder to not make it happen than in the other cars. Dealer just told me some are louder than others and that he could replace transmission but i may get a louder one and he didnt even take it in and look at it (same thing for another dealer i went to, he just printed me out a bulleton about it) don't think it would be possible to get a louder one than mine. Any suggestions would be appreciated
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Old 03-03-2013, 10:14 PM   #14
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I experience this too but never thought there was anything wrong.

I get that "knocking" sound if I slow down and engage the clutch too soon or too quickly while coming to a stop. If I begin pushing the clutch in below 15 MPH while coming to a stop there is not any knocking.
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Old 03-03-2013, 10:14 PM   #15
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Originally Posted by Mr. Wyndham View Post
It sounds like you might be leaving it engaged too long. Experiment letting off the clutch sooner. Sometimes, you can load it, erm..."backwards"? If the engine sputters down below normal idle speeds it will want to spin back up, and so when you release the clutch just before a stop it might make a little rattle sound as it releases that tension.

I discovered that at stoplights...I'd wait just a little too long to depress the clutch at a traffic signal. I don't know if that is your issue or not, though.
Ok I'll give that a shot. When I shift to reverse it should be more seamless? I might be waiting too long to make sure I don't end up in 5th instead of R.
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Old 03-03-2013, 10:23 PM   #16
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Mine had this issue. These cars are made with huge slack in the drivetrain. I personally do t think its you. I've driven nothing but sticks for 10 years and never heard any drivetrain slack noise before. It's caused by being made cheaply. It's incredibly annoying and changing how you drive can get rid of the noise. It's mostly from the 2 piece flywheel. There is a spring inside it that winds up and springs loose.

And shifting in reverse. Just wait 2-3 seconds and you should be good.
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Old 03-03-2013, 10:24 PM   #17
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it all has to do with it being a hydraulic system clutch, they just are not as consistent as the cable type, but they don't wear on you near as much
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Old 03-04-2013, 08:49 AM   #18
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Ok I'll give that a shot. When I shift to reverse it should be more seamless? I might be waiting too long to make sure I don't end up in 5th instead of R.
It won't be as likely to happen in reverse...practice smooth engagement, and some of the tips offered in here. You'll figure it out in time...that's the biggest thing - time.
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Old 03-04-2013, 09:17 AM   #19
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You shouldn't really have to think about how to drive your car all the time so you can stop the car from making an annoying noise. Mine makes it if I down shift, especially if I let the clutch out fast. When it happens at low speeds (like what you guys are talking about) like at a red light or stop sign its a bit embarrassing. Hey look at that nice car wonder whats wrong with it, or that guy can't drive. Really wish they could do something to fix it. Main reason why I want to sell this car as soon as I can.
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Old 03-04-2013, 09:20 AM   #20
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You shouldn't really have to think about how to drive your car all the time so you can stop the car from making an annoying noise. Mine makes it if I down shift, especially if I let the clutch out fast. When it happens at low speeds (like what you guys are talking about) like at a red light or stop sign its a bit embarrassing. Hey look at that nice car wonder whats wrong with it, or that guy can't drive. Really wish they could do something to fix it. Main reason why I want to sell this car as soon as I can.
I disagree. Practice makes perfect. No two cars have the same setup, especially with manual transmissions. And I don't care how expert a person is with manual transmissions, it will take some time (if only minutes for the protégés among us) to work out the "character traits".

Be mindful that we might not be talking about exactly the same thing, here. What does yours do when downshifting? ....If you've been to the dealer to eliminate the possibility of any mechanical problems - you may just need to be mindful of what you're doing. Eventually, it'll become habit, and you won't think any more.
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Old 03-04-2013, 09:44 AM   #21
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When I downshift it is almost impossible for my car not to make a clunk sound, so I wont downshift, and Im not going 60 mph and dropping it into 2nd gear just a normal downshift. Like I said the dealer, neither of them would even take the car into the shop and check and see if there was something else wrong with it they just said it was normal characteristic of the car (drive line clunk). I did drive others but they were no where near how loud mine is and it was hard even to make the sound in some of them. So I think there could be something else wrong with mine or a way just to make it like the other ones I drove.
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Old 03-04-2013, 09:44 AM   #22
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I disagree. Practice makes perfect. No two cars have the same setup, especially with manual transmissions. And I don't care how expert a person is with manual transmissions, it will take some time (if only minutes for the protégés among us) to work out the "character traits".
100% true. There is a lot more to learn about a manual car than how to drive it without stalling. After a year of "getting used to it", I can drive my M6 more smoothly than my wife's auto G37... especially at low speeds.
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Old 03-04-2013, 09:46 AM   #23
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When I downshift it is almost impossible for my car not to make a clunk sound, so I wont downshift, and Im not going 60 mph and dropping it into 2nd gear just a normal downshift. Like I said the dealer, neither of them would even take the car into the shop and check and see if there was something else wrong with it they just said it was normal characteristic of the car (drive line clunk). I did drive others but they were no where near how loud mine is and it was hard even to make the sound in some of them. So I think there could be something else wrong with mine or a way just to make it like the other ones I drove.
It sounds like you might not be rev-matching quite well enough (easier said than done). Mine will clunk while downshifting if I don't match the revs pretty close to perfect. It also doesn't like it if you take the throttle away too soon after downshifting.
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Old 03-04-2013, 10:28 AM   #24
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I disagree. Practice makes perfect. No two cars have the same setup, especially with manual transmissions. And I don't care how expert a person is with manual transmissions, it will take some time (if only minutes for the protégés among us) to work out the "character traits".

Be mindful that we might not be talking about exactly the same thing, here. What does yours do when downshifting? ....If you've been to the dealer to eliminate the possibility of any mechanical problems - you may just need to be mindful of what you're doing. Eventually, it'll become habit, and you won't think any more.
It's not him. It's the craptastic car. Mine did it too. It's because of huge tolerances in all the different parts of the drivetrain and the flywheel being made cheaper than a McDonald's happy meal toy. They aren't supposed to turn more than 15 degrees yet a brand new one can turn almost 180 degrees. I saw it with 2 of them out of the box. The noise is the flywheel flopping back and forth. Mine was lemon lawed over the noise and the garbage transmission with huge tolerances in it. It's a noise a dealer should try and repair not a noise the driver learns to drive around. Only an idiot would think that. It's unreasonable to think a brand new car needs a completely different driving style. How come ONLY a 5th gen v6 m6 makes this noise out of all the cars made and driven every day????
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Old 03-04-2013, 11:05 AM   #25
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Thats where I'm at now with it. Dealer isn't any help called 1 800 number and esculated it and they told me that there was nothing they would do because the dealers are there ears and they feel its fine and basically to bad if Im unhappy with it. So I just let the car sit in my garage for now. How did you even lemon law this problem. I cant even get the dealers to take it up on the lift and check things out on it.
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