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Chevrolet forgot to install a clutch return spring on a 63

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Old 12-21-2014, 01:47 PM
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MOXIE62
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Default Chevrolet forgot to install a clutch return spring on a 63

I was surprised to see that the C2 does not have a clutch return spring like the C1’s. Because of a weak left ankle I was planning on replacing that spring but as noted there is none there. Does anyone know of a bolt on mod to add a spring (do not want to weld on frame). According to previous owner the pressure plate is original to car and would be the diaphragm type, which I guess is the softest clutch available.
Old 12-21-2014, 02:00 PM
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Frankie the Fink
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Say what ???

The spring is not like a C1 but it is definitely there....on a '63 it attaches at a firewall hook. Item #18 in this '63 AIM pic... This is separate from the smaller anti-rattle spring at the other end of the bellcrank lower down...at the clutch fork lever...
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Last edited by Frankie the Fink; 12-21-2014 at 02:26 PM.
Old 12-21-2014, 04:30 PM
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MikeM
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Originally Posted by MOXIE62
I was surprised to see that the C2 does not have a clutch return spring like the C1’s.
If you are referring to the clutch over center spring under the dash on a C1 that uses a three finger clutch, that spring was to add extra force to push the pedal down. Not return the pedal until it's at the top of it's stroke. It's not needed with with a diaphragm PP.

Or is that what you're saying?
Old 12-21-2014, 04:36 PM
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JohnZ
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Originally Posted by MOXIE62
I was surprised to see that the C2 does not have a clutch return spring like the C1’s. Because of a weak left ankle I was planning on replacing that spring but as noted there is none there. Does anyone know of a bolt on mod to add a spring (do not want to weld on frame). According to previous owner the pressure plate is original to car and would be the diaphragm type, which I guess is the softest clutch available.
Midyears don't use the frame-anchored "Godzilla spring" on the Z-bar that was used on C1's - that over-center design disappeared with the coil-spring Borg & Beck clutch in 1962. They use a simple return spring, as noted above.
Old 12-21-2014, 04:38 PM
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Originally Posted by JohnZ
Midyears don't use the frame-anchored "Godzilla spring" on the Z-bar that was used on C1's - that over-center design disappeared with the coil-spring Borg & Beck clutch in 1962. They use a simple return spring, as noted above.
Is that the same spring pass cars used on the clutch linkage under the dash? Corvette used it on the frame?
Old 12-21-2014, 04:42 PM
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MOXIE62
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Originally Posted by MikeM
If you are referring to the clutch over center spring under the dash on a C1 that uses a three finger clutch, that spring was to add extra force to push the pedal down. Not return the pedal until it's at the top of it's stroke. It's not needed with with a diaphragm PP.

Or is that what you're saying?
What I'm saying is I would like to have more help in depressing the clutch like the C1 spring helps, even though the car does have a diaphragm.. My car like Frankie has the spring that he shows but that spring does not aid in making the clutch easier to push. If anything it adds a little more force to overcome but very little since the spring is small. Right now I'm doing OK with pushing the clutch down but if it gets to be to big of a problem, maybe I can get with a vendor and find a more lighter diaphragm clutch.
Old 12-21-2014, 04:43 PM
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Originally Posted by MikeM
Is that the same spring pass cars used on the clutch linkage under the dash? Corvette used it on the frame?
Dunno, Mike - I'm not familiar with the passenger car clutch linkage under the dash - if Verne is around, I'm sure he'll know. The "Godzilla spring" arrangement on C1 Corvettes was anchored at the frame, in the engine compartment.
Old 12-21-2014, 04:50 PM
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Originally Posted by MOXIE62
What I'm saying is I would like to have more help in depressing the clutch like the C1 spring helps, even though the car does have a diaphragm.. My car like Frankie has the spring that he shows but that spring does not aid in making the clutch easier to push. If anything it adds a little more force to overcome but very little since the spring is small. Right now I'm doing OK with pushing the clutch down but if it gets to be to big of a problem, maybe I can get with a vendor and find a more lighter diaphragm clutch.
If you loose the racing clutch and go with a OEM style clutch your grandma could push the pedal
Old 12-21-2014, 04:51 PM
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I drive both an original C1 and an original C2. The clutch effort on the C2 is easier to my thinking. Not sure how you improve on that.
Old 12-21-2014, 04:59 PM
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Originally Posted by Nowhere Man
If you loose the racing clutch and go with a OEM style clutch your grandma could push the pedal

Be kind.....it's Christmas time ya know.
Old 12-21-2014, 05:40 PM
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Originally Posted by RestoMike

Be kind.....it's Christmas time ya know.
Sorry. OEM clutchs are have a very soft pedal feel conspired to your go fast racing clutch
Old 12-21-2014, 06:24 PM
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Originally Posted by Nowhere Man
Sorry. OEM clutchs are have a very soft pedal feel conspired to your go fast racing clutch
You can release the clutch with hand pressure.
Old 12-21-2014, 06:26 PM
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Originally Posted by JohnZ
Dunno, Mike - I'm not familiar with the passenger car clutch linkage under the dash - if Verne is around, I'm sure he'll know. The "Godzilla spring" arrangement on C1 Corvettes was anchored at the frame, in the engine compartment.
The '55-'57 pass cars had that spring fastened to a bracket on the clutch pedal under the dash. It was very heavy duty. I guess I assumed the Corvette followed suit but doesn't look like they did.

Thanks.
Old 12-21-2014, 08:37 PM
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As mentioned, my guess would be that he OP has an aftermarket clutch!
Old 12-21-2014, 09:18 PM
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Originally Posted by Nowhere Man
Sorry. OEM clutchs are have a very soft pedal feel conspired to your go fast racing clutch
What?.... Could you retype that in English please?......
Old 12-21-2014, 09:26 PM
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Nope have original clutch, just weak ankle. What is an OEM clutch and can you still use the original steel flywheel.
Old 12-22-2014, 07:45 AM
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Originally Posted by MOXIE62
Nope have original clutch, just weak ankle. What is an OEM clutch and can you still use the original steel flywheel.
OEM = Original Equipment Manufacture.

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To Chevrolet forgot to install a clutch return spring on a 63

Old 12-22-2014, 09:01 AM
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Frankie the Fink
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I sent you a PM on something cheap, easy to install that you might try and I used on my '67 Chevelle.
Old 12-22-2014, 09:02 AM
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Originally Posted by MikeM
The '55-'57 pass cars had that spring fastened to a bracket on the clutch pedal under the dash. It was very heavy duty. I guess I assumed the Corvette followed suit but doesn't look like they did.

Thanks.
Only the '58 Passenger car shared that same spring with the Corvette. (V8 models only)

Verne
Old 12-22-2014, 11:14 AM
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If the OEM clutch is too hard to depress, I would suggest converting the car to a 700R4 automatic. If you simply try to add springs to lessen the effort, the clutch will disengage and never return to engagement.

I have no Gorilla spring on my '61, as I never had a B&B clutch installed in the car from when i first built it, Trying to put a G spring on it now, would just hold the pedal to the floor, IMO.

Doug


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