C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

ZF6 won't budge

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Old Sep 4, 2007 | 03:26 PM
  #1  
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Default ZF6 won't budge

So the shift ****, reverse lockout, center console, exhaust and driveline support beam are out, and I've disconnected all three electrical connections and taken out the five tranny to bell housing bolts, and I've got jacks under the engine and the ZF6 (centered on the drain plug). Only problem is, I can't get the transmission to separate from the engine. I've tried various combinations of supporting the engine and the transmission, and various angles, but nothing is going. Checked through old posts, but nothing there helped me, either. Is there something I'm missing, or is it just going to take some muscle? (Given that it's supposed to weigh 145 lbs, I won't be surprised if it's own heft is causing it to bind, but I want to make sure I'm not missing something obvious).
(1989 Z51, ZF6, L98)
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Old Sep 4, 2007 | 03:27 PM
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Clutch fork is holding it in, have to release it
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Old Sep 4, 2007 | 03:30 PM
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Knew it had to be something obvious like that. I'll see how it goes now. Thanks.
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Old Sep 4, 2007 | 04:07 PM
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Originally Posted by cuisinartvette
Clutch fork is holding it in, have to release it
Now by that do you mean I have to pull the slave cylinder to release pressure on the fork?
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Old Sep 4, 2007 | 05:30 PM
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More than likely it is just bound up by a warped disc. I've had a few that were like that and took some prying to get it off.

But yes, go ahead and pull the slave off.
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Old Sep 4, 2007 | 08:15 PM
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Maybe I am missing something but what about the Cbeam ?
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Old Sep 4, 2007 | 09:22 PM
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C-beam is out already.
I should hope it's not a warped disk. I just had the clutch replaced only a few thousand miles ago...
It's that stupid ball stud that I'm after. It's worked loose and makes one heck of a racket when you clutch in.
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Old Sep 4, 2007 | 10:51 PM
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Pulled the slave. Stupid thing is still stuck.
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Old Sep 5, 2007 | 07:02 AM
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It you're sure all the bolts are out, use a wide cole chisel and gently wedge it between the transmission and clutch housing all the way around. Once you get the input bearing retainer out of the clutch housing it'll almost fall out.
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Old Sep 5, 2007 | 07:36 AM
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Try having someone push in the clutch while you try to wiggle the trans out. This is what I had to do to get mine back in.

This is when the wife comes in handy
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Old Sep 5, 2007 | 08:15 AM
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Originally Posted by 96lt4c4
Try having someone push in the clutch while you try to wiggle the trans out. This is what I had to do to get mine back in.

This is when the wife comes in handy
Hmm.... I'm going to have to get me one of those...
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Old Sep 5, 2007 | 08:27 PM
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Update:
It finally came out after a lot of effort (thanks to my friend giving me a hand). Turns out it was mostly corrosion on the mating surfaces between the tranny and bell housing that was binding it up. Also, the ball stud was snug as a bug, so it's not the noise culprit. My next suspect is the throwout bearing, which I would've gone ahead and replaced while the tranny was out, but I spent too much time wrestling with the tranny, and my buddies with motorcycles want me to tag a long on a ride over in Alabama this weekend....
I'm just hoping that bearing won't be too cranky. I gave it a little extra grease.
Anyway, thanks to everyone who offered advice, it was much appreciated.
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