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Clutch fork short?

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Old Sep 7, 2016 | 07:40 PM
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Default Clutch fork short?

Hi guys I am installing 454 and tremec 5 speed in my 76 .I have McLeod clutch ,pressure plate and bell housing. Car was originally automatic so I purchased all clutch lineage from cc. Throwout bearing came wit clutch. My problem seems to b the clutch fork is too short its not centering throw out bearing on pressure plate.or is it that throw out bearing not correct.any help would b appreciated thanks
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Old Sep 7, 2016 | 09:38 PM
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Are you sure the throw out bearing is placed correctly on the fork?
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Old Sep 8, 2016 | 01:39 AM
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When you install altered parts like i did with a blow proof bell housing, block saver plate, and thinner SFI rated flywheel. You need an altered length pivot ball.

GM sells a longer stock pivot ball or you can buy adjustable pivot *****.

You can look up you tube videos on throw out bearing installation. Maybe watch one and it shows how to clip it in correctly
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Old Sep 8, 2016 | 04:15 PM
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Thank you for ur reply .throw out bearing is installed correctly. Don't think a longer pivot ball will help.will that move it more towards the center of pressure plate
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Old Sep 8, 2016 | 06:09 PM
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Originally Posted by Lilmubby
Thank you for ur reply .throw out bearing is installed correctly. Don't think a longer pivot ball will help.will that move it more towards the center of pressure plate
When the pivot ball is the correct length the throw out bearing and arm are 90 degrees to the input shaft at rest and some low clearance number to the PP fingers. This is your free play of the clutch petal. I usually try to set the clearance to .040 - .060

GM only made one length arm that I know of and after market bell housings are made to use standard parts

Last edited by gkull; Sep 8, 2016 at 06:12 PM.
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Old Sep 8, 2016 | 06:23 PM
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Originally Posted by Lilmubby
My problem seems to b the clutch fork is too short its not centering throw out bearing on pressure plate.
That's not possible. The fork does not position the TO bearing - it only engages with the TO bearing while the bearing "floats" in the fork. The position of the bearing is determined by the bearing slipping onto the transmission's input shaft housing. If the bearing is not centered on the pressure plate, you are implying that the entire transmission input shaft is not on crankshaft centerline, and that's not possible...

Last edited by lars; Sep 8, 2016 at 06:27 PM.
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Old Sep 8, 2016 | 07:39 PM
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Thank you .You are correct.got it together but think that i do need a longer pivot ball.
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Old Sep 8, 2016 | 07:54 PM
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Yes, you do. Get one of the adjustable ***** (like Lakewood) and set it exactly 1/8" taller than the stock ball. This will get the geometry very close to perfect.

Lars
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Old Sep 8, 2016 | 08:03 PM
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Just ordered one. Thanks again
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