clutch linkage problem
Thread Starter
Pro
Joined: Jul 2005
Posts: 720
Likes: 1
From: Holtwood PA
clutch linkage problem
I'm gonna fix this with a gallon of gas!!!
I just swapped a motor into my 75..I come to find out a lot of things are different from a regular 350..water pump, fuel pump, motor mounts, water pump pulleys, crank pulleys 
now I put a new clutch and throwout bearing in. The linkage is the same the trans is the same, yet when I push on the clutch it doesn't fully release. I have no adjustment left on the rod.what's wrong? when we put the throwout bearing in we pu the lever forks in the groove of the to bearing. is this the wrong spot? could it have slipped out when sliding the trans in? I see it pushing against the throwout bearing help
I just swapped a motor into my 75..I come to find out a lot of things are different from a regular 350..water pump, fuel pump, motor mounts, water pump pulleys, crank pulleys now I put a new clutch and throwout bearing in. The linkage is the same the trans is the same, yet when I push on the clutch it doesn't fully release. I have no adjustment left on the rod.what's wrong? when we put the throwout bearing in we pu the lever forks in the groove of the to bearing. is this the wrong spot? could it have slipped out when sliding the trans in? I see it pushing against the throwout bearing help
Racer
Joined: Jun 2005
Posts: 357
Likes: 8
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19
If everything is in as it is supposed to be, the problem could be the fork pivot ball length or height. I had to switch to a Mr Gasket adjustable clutch rod to get the clutch fork to travel enough to disengage the disk. Seems my pivot ball a different height.
Le Mans Master
Joined: Jul 2004
Posts: 6,248
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From: Lancaster PA
Thread Starter
Pro
Joined: Jul 2005
Posts: 720
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From: Holtwood PA
Corvetteforum comes through again
I think I have the answer. there was a nother thread about this identical problem...It seems it's fairly common...and it does have to do with the pivot ball. I had my flywheel cutdown, which brings the bolting surface even with the clutch disk surface plus a hair more to cut the glazing and make it a uniform surface. That makes the whole clutch pack further forward, requiring
more clutch travel...so I can put the longer ball in.....if I seperate trans from bellhousing...But I think I can cheat!
I'll get a clevis pin setup to thread onto the clutch pedal rod...this will effectively give me a longer rod, i.e. more adjustment in the linkage...Woo hoo!!! my vette will be on the road in time for....snow global warming my ***!!!
more clutch travel...so I can put the longer ball in.....if I seperate trans from bellhousing...But I think I can cheat! I'll get a clevis pin setup to thread onto the clutch pedal rod...this will effectively give me a longer rod, i.e. more adjustment in the linkage...Woo hoo!!! my vette will be on the road in time for....snow global warming my ***!!!
Le Mans Master
Joined: Apr 2007
Posts: 7,353
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From: Graceland in a Not Correctly Restored Stingray
BTDT, thinking seriously about possibility of installing the "Rod Links" trick linkage w/heim-joint ends from www.speeddirect.com
Last edited by TheSkunkWorks; Apr 30, 2007 at 08:03 PM.
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Drifting
Joined: Jan 2004
Posts: 1,991
Likes: 3
From: Piscataway NJ
I would opt. to change the piviot stud. I had the same problem it caused the same problems you mentioned plus a hard pedal. I tried the speeddirect option yes I could shift it but the pedal just didn't feel right. Junked the speeddirect fix and put in the correct stud and all is good. Has something to do with pivot angles that I understand but can't explain.
Le Mans Master
Joined: Oct 2005
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From: Macon, GA
Thread Starter
Pro
Joined: Jul 2005
Posts: 720
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From: Holtwood PA
didn't fix it!!! something is wrong insode the bellhousing.. now it'll release with heavy foot pressure and makes noise like a bad throw out bearing this is my hobby.. I enjoy this...it relaxes me... where's my gun??
Instructor
Joined: Aug 2004
Posts: 103
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From: Alpharetta GA
The problem is you don't have enough clutch "total travel" you can lengthen the rod all day long and you will never effect this travel distance. To get a longer total travel you either need a longer pivot ball or lengthen the the lower "ear" on the clutch cross shaft. I went through this and extending the lower ear will give you additional travel but the clutch pedel will be harder to push with your foot
Last edited by PinHead; Apr 14, 2007 at 11:05 PM.
Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
Mine was when I bought the car. Took a LOT of foot pressure to push the clutch in. It all worked fine except the extra effort and some noise on disengagement. So much extra effort required I broke my clutch pedal off the bracket on the inside of the car. Fixed that, Drove it 5000 miles and discovered the disk in backward when I disassembled it to restore. Bubba was here!
Last edited by 63mako; Apr 15, 2007 at 12:42 PM.
Le Mans Master
Joined: Oct 2005
Posts: 9,429
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From: Macon, GA
When you get the tranny out, you need to pull the bellhousing as well and measure from the bellhousing/block to the ball tip. It needs to be 4.750 (4 3/4) inches. Just lay down a straight edge across the bellhousing and measure to the tip of the ball stud.
Thread Starter
Pro
Joined: Jul 2005
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From: Holtwood PA