C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

new spec clutch clearance issues

Old 05-15-2019, 07:02 PM
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Default new spec clutch clearance issues

Put in new spec clutch 71 sb.Measured throw out bearing clearance with fork disconnected.1/2 of free play. Pedal free play 3inches.Manual says heavy duty trans 2 and a,half.Clutches releases close to floor. Like 1and a half inches. Pedal rod adjusted all the way out to end . thanks for any help
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Old 05-15-2019, 07:36 PM
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These Corvettes can’t tolerate a clutch that doesn’t release in less than about .560 inches. I would test the clutch in a press and if it doesn’t release in less than .560 inches it won’t work in a Vette no matter what release bearing and/or pivot ball you use. I have run into this in my car. You certainly don’t need 1/2 an inch of bearing clearance. As little as 1/8 of an inch will be fine. Here is a great thread to read by a very knowledgeable and well respected member here which also applies to our C3’s.


Last edited by 69ttop502; 05-15-2019 at 07:41 PM.
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