noise when clutch not pressed
Thread Starter
5th Gear
Joined: Nov 2003
Posts: 5
Likes: 1
From: Union City CA
noise when clutch not pressed
Need help. I hear noise when clutch is not deppressed, the noise almost go away when I step on the clutch. Could it be a tranny problem? Any suggestion would help.
Thanks
Thanks
Racer
Joined: Oct 2003
Posts: 286
Likes: 1
From: Fairfax VA
Re: noise when clutch not pressed (conv89vette)
There's a lot of gear chatter... I think the 89 had the ZF-6 or something pretty comparable.
If it's a LOT of noise, there could be a problem. Mine has a bit of a whine but if I have the stereo on at all, it's hard to hear.
Mike
[Modified by ediconu, 11:34 AM 11/17/2003]
If it's a LOT of noise, there could be a problem. Mine has a bit of a whine but if I have the stereo on at all, it's hard to hear.
Mike
[Modified by ediconu, 11:34 AM 11/17/2003]
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Re: noise when clutch not pressed (conv89vette)
The ZF6's are noted for being noisy gearboxes.
Unless there is a shift problem, or noise when you drive, I would not worry.
oh, some noise (gear whine), mainly in 1st or 2nd, is normal, too.
Unless there is a shift problem, or noise when you drive, I would not worry.
oh, some noise (gear whine), mainly in 1st or 2nd, is normal, too.
Team Owner
Joined: Sep 2002
Posts: 22,209
Likes: 12
From: OBAMA IS HITLER
Re: noise when clutch not pressed (conv89vette)
Max, I've had two ZF-6 vettes now, both 1990.......some whine without the clutch enabled is normal. The one I sold had some, the one I have now is almost completely quiet. As long as you don't get REALLY loud noise, or clacking, you'll most likely be perfectly fine :thumbs: Now go out and ENJOY :cheers:
Thread Starter
5th Gear
Joined: Nov 2003
Posts: 5
Likes: 1
From: Union City CA
Re: noise when clutch not pressed (oldace84)
I thought the throw out bearing would make the noise when the clutch is being pressed ( when it's going bad). Could it be the the input shaft or input shaft bearing?
Burning Brakes
Joined: Aug 2003
Posts: 899
Likes: 0
From: Copperas Cove TX
Re: noise when clutch not pressed (conv89vette)
No the bearing makes the noise as it sets and idles or before you engage the clutch. When you engage the clutch it puts pressure on it and it quiets down.
HAVE A GREAT DAY!!!
:flag
[Modified by LoneStarSoldier, 1:52 PM 11/18/2003]
HAVE A GREAT DAY!!!
:flag
[Modified by LoneStarSoldier, 1:52 PM 11/18/2003]
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1st Gear
Joined: Nov 2003
Posts: 1
Likes: 0
From: mesa az
Re: noise when clutch not pressed (conv89vette)
Hi, im a new guy to thin forum but i've been reading here ever since i got my vette.
It sounds like a throw out bearing to me. I had 3 s-10s make a rattle untill you depress the clutch. Every one of them was the throw out bearing.
It sounds like a throw out bearing to me. I had 3 s-10s make a rattle untill you depress the clutch. Every one of them was the throw out bearing.
Burning Brakes
Joined: Sep 2003
Posts: 1,214
Likes: 0
From: Miami FL
Re: noise when clutch not pressed (LoneStarSoldier)
No the bearing makes the noise as it sets and idles or before you engage the clutch. When you engage the clutch it puts pressure on it and it quiets down.
HAVE A GREAT DAY!!!
:flag
[Modified by LoneStarSoldier, 1:52 PM 11/18/2003]
HAVE A GREAT DAY!!!
:flag
[Modified by LoneStarSoldier, 1:52 PM 11/18/2003]
Burning Brakes
Joined: Sep 2003
Posts: 1,214
Likes: 0
From: Miami FL
Re: noise when clutch not pressed (conv89vette)
Need help. I hear noise when clutch is not deppressed, the noise almost go away when I step on the clutch. Could it be a tranny problem? Any suggestion would help.
Thanks
Thanks
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Re: noise when clutch not pressed (conv89vette)
Bogus and Bradvette have your answer above. I've done alot of research into this noise (my '95 does it with low mileage). I discussed it at length with a techy at Rockland Standard Gear (ZF's official service folks in NA). Basically nothing to worry about, the ZF6 has almost straight cut lower gears to get the high torque rating. If you know anything about gears straight cut they equal noisy. The whine you hear in neutral, 1st, 2nd and a little in 3rd is normal for a ZF6. The early models (pre'94 I think) made a little more noise than the later years, and also have a higher torque rating. Have you ever heard a true racing transmission? Well they sound like your ZF6 just much louder (listen to the in-car camera audio from NASCAR at low speed or WRC).
People that don't own a ZF6 will swear it's the release bearing, but it's not, they all do it to some extent, some worse than others (due to model, oil, wear, temperature, alignment, etc.) Just turn your radio up and have fun!
BTW, the first thing to go on a ZF6 is the sychros. The techy at Rockland told me bearing failure in a ZF6 is extremely rare. Make sure your clutch is working properly to save your synchros.
:cheers:
People that don't own a ZF6 will swear it's the release bearing, but it's not, they all do it to some extent, some worse than others (due to model, oil, wear, temperature, alignment, etc.) Just turn your radio up and have fun!
BTW, the first thing to go on a ZF6 is the sychros. The techy at Rockland told me bearing failure in a ZF6 is extremely rare. Make sure your clutch is working properly to save your synchros.
:cheers:
Burning Brakes
Joined: Oct 2002
Posts: 1,193
Likes: 1
From: Meadville PA
Re: noise when clutch not pressed (conv89vette)
it's not the throw out bearing ...it is the straight cut gears and is especially loud on the 89 models... i own a 89 vert and before i bought it i was very concerned about this whine that i heard...after long debates and discussions with many different people... the answer was the same ...."oh you have an zf...they are noisier than the later years" guess what 3 years later no problem still whines.. i wouldn't worry about it if it shifts smoothly and is quiet at highway speeds.... mine whines in neutral 1st and 2nd ...i myself think it sounds good...it grabs attention when your cruisin around slowly and ya hear the whine coming people want to know what is that ...just like a blower whine... :D
Safety Car
Joined: Feb 2000
Posts: 3,771
Likes: 0
From: MANDEVILLE, LA La
Re: noise when clutch not pressed (conv89vette)
Mine does it also. If it goes away when you rest your foot slightly on the pedal it's the throwout bearing slightly touching the pressure plate causing a little chirp sound. As it wears, the play will automtically be taken up.No more chirping.
Instructor
Joined: Oct 2008
Posts: 141
Likes: 0
From: San Diego CA
We are talking about this in another thread in the general section "Noise from Clutch." My LT4 has the same issue and its the input shaft bearing and/or the counter shaft bearing. Apparently its not the T/O bearing unless the noise is heard when the clutch pedal is pressed. In my car, when the pedal is pressed, the noise goes away. Only when the pedal is out do I hear noise. From what I understand, you don't need to attend to this issue until the noise gets so loud that you can't take it anymore. Just spoke to Larry Hofer at the Corvette Shop here in San Diego yesterday.
Racer
Joined: Dec 2009
Posts: 298
Likes: 0
From: Reno NV
I have a 89 w/6speed also, i've heard if your motor has a slight miss like a bad injector or something the flywheel will rattle. Mine rattles like this when its warmed up. Still tring to figure it out. i'm thinking new injectors will smooth it all out! (I hope)
Racer
Joined: Sep 2009
Posts: 416
Likes: 1
From: Owego NY
Mine made a weird noise today when I down shifted into 2nd gear. I was almost at work so when I got to work I had the radio turned off and with the car in neutral and the clutch out, it was making a noise almost like a clanking but definitely wasn't gear whine. As soon as I push the clutch in it is quiet. I am supposed to be leaving for an autocross down in NC tomorrow after work and I don't want to drive it if it is going to cause damage. My first thought is that it might be the throw out bearing, but I'm not sure what would have made it make the noise all of the sudden. Any ideas?
Drifting
Joined: May 2007
Posts: 1,426
Likes: 165
From: Motor City
Normal.
Got to love the people who automatically jump on the T/O bearing being bad, making the OP worry that he needs major trans service. Most likely this is NOT correct.
My 93 makes considerable noise when the clutch pedal is out and in N. When pressed, it goes away. Completely normal situation for the transmissions in the c4's.
Got to love the people who automatically jump on the T/O bearing being bad, making the OP worry that he needs major trans service. Most likely this is NOT correct.
My 93 makes considerable noise when the clutch pedal is out and in N. When pressed, it goes away. Completely normal situation for the transmissions in the c4's.
Le Mans Master
Joined: Mar 2001
Posts: 7,999
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From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12
Mine made a weird noise today when I down shifted into 2nd gear. I was almost at work so when I got to work I had the radio turned off and with the car in neutral and the clutch out, it was making a noise almost like a clanking but definitely wasn't gear whine. As soon as I push the clutch in it is quiet. I am supposed to be leaving for an autocross down in NC tomorrow after work and I don't want to drive it if it is going to cause damage. My first thought is that it might be the throw out bearing, but I'm not sure what would have made it make the noise all of the sudden. Any ideas?
Racer
Joined: Sep 2009
Posts: 416
Likes: 1
From: Owego NY
I have a lightened aluminum flywheel and a 6 puck clutch in there now. Not a fan of the clutch at all. I put about 1,500 miles on the car and 5th and 6th make noises, and then there is gear whine, but this noise is a new noise and i'm not sure why it just all of the sudden came around when I didn't do anything different or change anything.
