VIDEO..!! Noisey clutch or bearing or bushing.....
- Thread starter nodemon
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My vote goes for the throw-out bearing.
Throwout could still make noise while in gear driving..?
Yes
AJ/FormS
68 Formua-S fastback clone 367/A833/GVod/3.55s
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I disagree with the TO bearing idea, it can clearly be seen spinning even before the noise starts....... But I also don't have a clue what it is. I've been running the A833s almost continuously since 1970, and have never heard that sound.
But don't worry, you'll see what it is when you get the clutch back on the bench.
If I had to guess, I'd say that the disc is in backwards, or the diaphragm is busted.
As for the constant noise in all gears except Direct, that would most likely be the Front bearing.
The two noises might be related.
For instance;
1) When stopped/trans in neutral/foot off the pedal; the input shaft and cluster and all the gears will be spinning at Idle-rpm, together with the clamped disc. If you have noise at this time, and the TO bearing is stationary as it should be, then the noise pretty much has to be originating in the front bearing.
2) if you then clutch it and put the trans in any gear, that action will stop all the trans guts from spinning, including the front bearing. So noise at this time theoretically can only be coming from the spinning TO bearing.
3) but the noise that you are experiencing seems to be coming from the returning diaphragm-spring
4) in other words, you may be having two noises from separate sources.
5) but like I said, not having ever heard that noise before, IDK. But recognizing that it shouldn't be there, and it won't heal itself, I'd be dropping BOTH the box and the clutch, paying attention to which way the disc comes out. However, by this time, there will likely be lots of witness marks, that should tell what is going on..
But don't worry, you'll see what it is when you get the clutch back on the bench.
If I had to guess, I'd say that the disc is in backwards, or the diaphragm is busted.
As for the constant noise in all gears except Direct, that would most likely be the Front bearing.
The two noises might be related.
For instance;
1) When stopped/trans in neutral/foot off the pedal; the input shaft and cluster and all the gears will be spinning at Idle-rpm, together with the clamped disc. If you have noise at this time, and the TO bearing is stationary as it should be, then the noise pretty much has to be originating in the front bearing.
2) if you then clutch it and put the trans in any gear, that action will stop all the trans guts from spinning, including the front bearing. So noise at this time theoretically can only be coming from the spinning TO bearing.
3) but the noise that you are experiencing seems to be coming from the returning diaphragm-spring
4) in other words, you may be having two noises from separate sources.
5) but like I said, not having ever heard that noise before, IDK. But recognizing that it shouldn't be there, and it won't heal itself, I'd be dropping BOTH the box and the clutch, paying attention to which way the disc comes out. However, by this time, there will likely be lots of witness marks, that should tell what is going on..
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Inertia
Well-Known Member
The extra large head on the flywheel bolts appear to be interfering with the bellhousing or somesuch.
Take one of those bolts out and look for a witness mark from rubbing on bellhousing.
Almost seems like sparks coming from above starter drive.
Might be my eyes.
I'd put regular bolts in, and try it.
Good luck
Take one of those bolts out and look for a witness mark from rubbing on bellhousing.
Almost seems like sparks coming from above starter drive.
Might be my eyes.
I'd put regular bolts in, and try it.
Good luck
It shouldnt. It only spins when you push the pedal down.
Disc in backwards?
The tranny sat in my garage for a few years after I bought it. It had been recently rebuilt before I purchased it. I took the clutch, pressure plate and flywheel to a local auto / machine shop to get checked out because I had no history on it, and all checked out fine.
A few mentions of disc possibly being installed backwards..I'm no mechanic, but is that really a thing..? I don't see myself installing it wrong, but I guess if it's possible, maybe so. I guess it all needs to come out anyway with that noise so I'll know soon enough.
I'll soon find out.. I just don't see how that could happen. I did do the installation and im no mechanic, so we'll see... ugh..
Inertia
Well-Known Member
Everytime I tried to put the disc in backwards, the flywheel crankbolt heads interfered with the center hub/spring assembly and wouldn't allow the disc friction surface closer than about a 1/4 inch from the flywheel.
I've tried it since the first discussion a decade ago, and I believe one of our "Dave" members also went out to his shop and tried.
Same result. - It won't fit .
I know you can do it on some chubbys, (been there) maybe ferds.
The small mopar 6 cyl discs with the rubber "springs" might go in backwards.
Last edited:
matthon
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I had a bad input bearing once, made a terrible noise unless I depressed the clutch pedal and stopped the input shaft from spinning.
If the bell isn't aligned to the center of the crank, bellhousing runout, the input shaft can rub on the inside of the bearing retainer, and that would make a grinding sound.
This could also keep the input shaft spinning when depressing the clutch pedal, rubbing on the inside of the bearing retainer, or keeping a bad input bearing spinning.
It will also wear the pilot bushing out.
The front ball bearing is pretty forgiving, and can even be trouble free, for a time, with an unaligned bell, but it will cause issues sooner or later.
Agreed, throwout bearing should not be spinning when pedal is not depressed, in neutral or driving, and if you can get the pressure plate on with the disc in backwards I'd be surprised.
If the bell isn't aligned to the center of the crank, bellhousing runout, the input shaft can rub on the inside of the bearing retainer, and that would make a grinding sound.
This could also keep the input shaft spinning when depressing the clutch pedal, rubbing on the inside of the bearing retainer, or keeping a bad input bearing spinning.
It will also wear the pilot bushing out.
The front ball bearing is pretty forgiving, and can even be trouble free, for a time, with an unaligned bell, but it will cause issues sooner or later.
Agreed, throwout bearing should not be spinning when pedal is not depressed, in neutral or driving, and if you can get the pressure plate on with the disc in backwards I'd be surprised.
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