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clutch drag/grind

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contact148 View Drop Down
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    Posted: 01 Sep. 2008 at 6:02pm
OK  my clutch SOMETIMES grinds when IN gear (any gear) and pedal depressed and engine revs over 1K-ish
 
I opened the inspection cover  and can see the clutch disk "chattering" a wee bit and moveing slightly, it should be staying put with pedal down should it not?
 
linkage is adjusted properly
 
clutch rod is 10.5 long
 
I can see the release fork is pulled back as far as it can with pedal depressed  so i cant adjust it for more pull  Im not maxed out in cable adjustment
 
this has been fine for the last 400 miles  and now all of the sudden it does this  but NOT all the time
 
Ive changed nothing
 
it can go days without doing it
 
it shifts fine   never slips  only grinds when i mis-shift
 
any ideas??
 
 
 
 
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hillbilly21 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hillbilly21 Quote  Post ReplyReply Direct Link To This Post Posted: 01 Sep. 2008 at 7:53pm
  Could be throw-out bearing   or the springs in the clutch plate are sprung (worn) out
1946 CJ2a POW-MIA
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contact148 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote contact148 Quote  Post ReplyReply Direct Link To This Post Posted: 01 Sep. 2008 at 8:07pm
 bearing is ok  I thought that 1st too
 
 
how can i check the springs?  how can you tell if they are bad
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hillbilly21 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hillbilly21 Quote  Post ReplyReply Direct Link To This Post Posted: 01 Sep. 2008 at 8:18pm
 I have taken a long screwdriver and made my way through the inspection plate and clutch to the springs and then tried to move them from side to side...they should be tight ..one could be busted in half ..I am not saying this is your problem but sounds like you got one ...I would hate to say put in a complete new set-up before I found the problem..
  I had a flywheel bearing wear out and it made all kinds of noise ..didnt know it was that until I tore everything apart..clutch ,plate,t-out bearing was okay just the flywheel brass shim
1946 CJ2a POW-MIA
51 M38 DOC. ORIGINAL
www.eastcoastwillys.org
59-WILLYS TRUCK
PRES NC FLAT FENDERS CLUB
www.eastcoastwillys.org
hillbillystoys.phanfare.co
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PeterC Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep. 2008 at 9:11am
Where is this inspection plate?
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contact148 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote contact148 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep. 2008 at 5:46pm
Originally posted by PeterC PeterC wrote:

Where is this inspection plate?
 
remove the shifter cover plate and it is on the bellhouseing
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doug1953 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote doug1953 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan. 2009 at 6:11pm
Contact148, I am having the exact same problem.   I even pulled the engine, put in new clutch plate and disc and throw out bearing.  Used a timken quality bearing.   Problem cured, drove about 300 miles and now the same intermittent problem has returned.   It seems to first occur when I am downshift from 3rd to 2nd with clutch depressed, especially if I goose the throttle just a bit with the clutch depressed.   Then once I get it to making the noise, it will keep making it every time I have the clutch depressed and I goose the throttle a bit.   Did you ever figure out the cause or fix the problem.   This has me baffled.   I have plenty of 90 weight gear lube in the case and tranny so low oill is not the problem.
Doug
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GaryArf Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan. 2009 at 7:36am
QUOTE=contact148]OK  my clutch SOMETIMES grinds when IN gear (any gear) and pedal depressed and engine revs over 1K-ish
 
I opened the inspection cover  and can see the clutch disk "chattering" a wee bit and moveing slightly, it should be staying put with pedal down should it not?
[/QUOTE/
 
It sounds like the bushing in the flywheel is worn and letting the shaft wander
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doug1953 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote doug1953 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan. 2009 at 9:03am
Ok thanks a million, a chattering disc makes perfect sense.  I will check to see if the clutch disck is chattering.  That is exactly what it sounds like.    The only problem is what is causing it.   I just put in a brand new pilot bushing.   It was doing it before on a brand new pilot bushing.     My engine was running a little rough and vibrating due to a partially blown head gasket which I just discovered.   I am changing the head gasket now.   I wonder if the engine vibration alone , without a worn pilot bushing, could be enough to get the clutch disc chattering.    I do not think the tranny is bad it was rebuilt a thousand miles ago, I believe there is a new bearing at the front of the tranny and I do not think the bearing at the input shaft is bad.     
Doug
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