Clutch Question
#944684
03/06/11 08:06 PM
03/06/11 08:06 PM
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Joined: May 2005
Posts: 66
Kansas City, MO
Hans68Charger
OP
member
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OP
member
Joined: May 2005
Posts: 66
Kansas City, MO
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Hi,
I have a 383 in my 68 Charger with a 23 spline 4 spd trans. The trans is rebuilt, and the clutch is a new McCleod 10.95 clutch and a new 10 1/2 inch billet steel flywheel.
My problem is that the engagement of the clutch is right at the top of the pedal travel...meaning that it doesn't engage until I almost completely let off the clutch. I have played with adjusting the clutch and all that does is reduce the amout of pedal travel, not the engagement point.
I have all new nylon bushings in the z-bar, and there does not appear to be any play in the linkage.
In the past, my experience with new clutches is that the engagement tends to be near the floor. Why is the engagement on a new trans/clutch/flywheel near the top? Needless to say, it tends to slip under any power.
Any ideas on what I did wrong here? Any input, good or bad, is appreciated.
Hans
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Re: Clutch Question
[Re: Hans68Charger]
#944685
03/06/11 09:25 PM
03/06/11 09:25 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I'm not a stick guy but if it was good b 4 & the only ch was the Mcleod stuff I'm thinking they sent the wrong part, maybe the height of the throwout bearing is now different. but I have ran Mcleod clutches in our circle track car & it's good stuff
live every 24 hour block of time like it's your last day on earth
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Re: Clutch Question
[Re: Hans68Charger]
#944688
03/07/11 08:51 PM
03/07/11 08:51 PM
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Joined: Jan 2003
Posts: 25,747
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,747
Rio Linda, CA
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Forget about the free play at the pedal and set the gap at the fork at 5/32" like the factory says. Be sure there is a return spring at the fork.
If the clutch still engages high its just the nature of the beast or you have the wrong fork.
The INTERNET, the MISinformation superhighway
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Re: Clutch Question
[Re: Hans68Charger]
#944689
03/07/11 10:29 PM
03/07/11 10:29 PM
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Joined: Nov 2007
Posts: 21,819
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,819
Kirkland, Washington
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Quote:
Thanks, I am pretty sure that the TO bearing is not resting up against the fingers. The freeplay measured at the pedal is about an inch.
My thought is that the disk or flywheel is not the correct thickness...or possibly the TO bearing is not the correct one. Any thoughts on that?
Does anybody know off hand what the correct thickness for the disk and flywheel? I guess I can call the manufacturer.
Couple thoughts:
Flywheel thickness is not an issue here--The amount of pressure the pressure plate will exert in the 'relaxed' position will be the same if the plate is 1/4" or a mile thick.
The disc thickness will affect pressure--but its not likely, unless you have a seriously miss-matched disc and pressure plate.
TO bearing wrong?? All it does it actuate the fingers, if its too "long" then you risk it always being in contact with the fingers, and you dont think thats the case. If its too short, then you would have a lot of free play, but engagement would be farther to the floor, and the pressure plate would still be exerting its max force on the disc.
Could you have a defective pressure plate? A contaminated (oil) disc?
Glazed disc?
Could the pressure plate itself be binding up--I would watch its action as a helper engages and dis-engages the clutch.
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Re: Clutch Question
[Re: Pacnorthcuda]
#944690
03/08/11 09:33 AM
03/08/11 09:33 AM
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Joined: May 2005
Posts: 66
Kansas City, MO
Hans68Charger
OP
member
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OP
member
Joined: May 2005
Posts: 66
Kansas City, MO
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Quote:
Forget about the free play at the pedal and set the gap at the fork at 5/32" like the factory says. Be sure there is a return spring at the fork.
If the clutch still engages high its just the nature of the beast or you have the wrong fork.
I actually did check the air gap and it was within spec. The wrong fork is something I had not thought of. My four speed system is put together with a bunch of parts scavenged from other cars. Thanks
Quote:
Couple thoughts:
Flywheel thickness is not an issue here--The amount of pressure the pressure plate will exert in the 'relaxed' position will be the same if the plate is 1/4" or a mile thick.
The disc thickness will affect pressure--but its not likely, unless you have a seriously miss-matched disc and pressure plate.
TO bearing wrong?? All it does it actuate the fingers, if its too "long" then you risk it always being in contact with the fingers, and you dont think thats the case. If its too short, then you would have a lot of free play, but engagement would be farther to the floor, and the pressure plate would still be exerting its max force on the disc.
Could you have a defective pressure plate? A contaminated (oil) disc?
Glazed disc?
Could the pressure plate itself be binding up--I would watch its action as a helper engages and dis-engages the clutch.
Good thoughts. I am going to do what you suggest and get my brother over to help me out. Thanks alot for the input and suggestions.
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