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Corvette clutch fork dimensions

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Old Jul 28, 2024 | 03:19 AM
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Default Corvette clutch fork dimensions

Hi all,

Some might know I'm swapping in a manual transmission.
Parts are scarce here, customs doesn't help either. The fact that this car needs to be ready in 4 weeks doesnt help either.
Could someone measure the distance between the pivot ball and where the clutch rod attaches to the clutch fork for me? Measured from the side would be the easiest to compare distances.

If you could measure how "high" the rod hole sits with the fork on a flat surface, that'd be helpful as well.

Would be a massive help. I have a short fork which ill modify with my trusty welder.



Thanks again!
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Old Jul 28, 2024 | 12:45 PM
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1964 through 1981 Corvettes use the same clutch fork.


I found this old post on C2 side of the forum. See post #2. 65 Clutch linkage issue

Last edited by sunflower 1972; Jul 28, 2024 at 03:24 PM.
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Old Jul 28, 2024 | 12:49 PM
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In addition, a google search for part #3887177 yields a bunch of results:
3887177 clutch fork Good luck.
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Old Aug 1, 2024 | 02:22 PM
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Dusky - Let me know if you still need further dimensions. I am supposed to have a new fork arriving in the mail for the auto - manual conversion that I'm doing on my '72.
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Old Aug 1, 2024 | 05:34 PM
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Let the experts help you.
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Old Aug 2, 2024 | 08:25 AM
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Originally Posted by J-Vette1
Dusky - Let me know if you still need further dimensions. I am supposed to have a new fork arriving in the mail for the auto - manual conversion that I'm doing on my '72.
Hi, yes actually. I'm installing the bellhousing tomorrow so if you could measure it, that'd be great!
My plan B was using threaded rod with the same swivel as on the pedal to Z bar rod.
plan C was some guesswork based of internet pictures 🙈
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Old Aug 13, 2024 | 05:36 PM
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Default Best estimate on height..3.75




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Old Aug 13, 2024 | 05:48 PM
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Sorry, I originally didn't see any reply, so may be too late. There is an optical illusion, but center of pivot ball to center of clevis pin hole estimate is 6 5/8. The height is trickier because it does not sit flat. Estimate to a "neutral location" where the fork would just be contacting the t.o. bearing: 3.
75 iinch. I sat it on a flat surface, and pushed down until the contact area looked about neutral, but this is merely a midway guess. It can range taller or shorter. As tight as these guys are....I recommend getting one from a supplier.

Last edited by J-Vette1; Aug 13, 2024 at 06:02 PM.
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