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79 Clutch

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Old Mar 29, 2009 | 12:22 PM
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Condor945Vette79's Avatar
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Default 79 Clutch

I just want to see if someone has had this happen to them. I did a rebuilt on the motor and since I had it out I went along and replaced the clutch disk, throwout bearing, and resurfaced the flywheel. Got everything all back together and when the car was not running I was able to shift through all 4 gears and reverse. Then when I got it started up I wasnt able to shift through any of the gears. If I started it in 1st I had a hard time getting it out of 1st. Sometimes I could, but then it would just be stuck in neutrel. The only gear that it was different for was reverse. I would try to put it in and that is the only gear where it will actually grind, but if I turn the car off it will go into reverse and work. The other thing is when it is in gear and with the clutch in all the way the car would still move forward. So that tells me the clutch isnt fully disengaging. I've tried to adjust the clutch peddal, but that didnt make any difference. My hunch right now is that I dropped the ball and put the clutch disk in backwards. Just throwing this out and seeing if what is wrong sounds consistent and right to everyone else for having the disk in backwards. Thxs
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Old Mar 29, 2009 | 12:29 PM
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oh that would suck! i'd still question the ajustment, sounds like its not completely disengaging as you said. have someone work the pedal while you watch the clutch fork movement.. did you compare the old and new parts to make sure they were exact?
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Old Mar 29, 2009 | 12:36 PM
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I know its not the adjustment because I did like you said, adjusted it and went under it and took a gander in the bellhousing while my friend pushed in the clutch. Even with the adjustment tweaked up as far as it could go it still wasnt disengaging.
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Old Mar 29, 2009 | 12:46 PM
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I had a similar problem to this and after changing the throwout bearing and taking the tranny out a couple of times I could not figure out what was wrong. It was a new Luk clutch from Autozone. I tried ajusting and everything else I could think of...I finally took it to a corvette specialty shop. They called me and said that the new pressure plate was defective and then when they replaced it with another generic clutch it suddenly shifted smooth as silk.
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Old Mar 29, 2009 | 01:10 PM
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71coupe454
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I have seen that happen.. if you pull the trans, look at the fingers on the pressure plate and see if several of them or not out inline with the rest of them.
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Old Mar 29, 2009 | 01:31 PM
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i ma seeing this alot, I have a centerforce and I had to fab a longer push rod that hooks up to the clutch fork... problem solved
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Old Mar 30, 2009 | 07:34 PM
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Well, after hearing all of this I think I'm going to lean more towards blaming the pressure plate. In about 2 weeks when I take it all apart I should know and hopefully be able to get it taken care of so I can drive it this summer.
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