Manual Transmission T56 | T5 | MN12 | Clutches | Hydraulics | Shifters

Please help!!! Big problem!!!

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Old 09-03-2008, 10:56 PM
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Default Please help!!! Big problem!!!

I replaced my old t56 and ls7 clutch with a centerforce df 12" clutch and a used mn12 out of a gto. Everything went well but after finishing and starting the car it won't go into any gears. I figured I'd try starting it in gear with the clutch in, I'm not sure if it actually went all the way into first, but as soon as the motor turned over it kicked it right out of gear. I replaced the slave, put in a new pilot bushing, and bled the hell out of the hydraulics. Does anyone have ideas? Its my DD and I haven't driven it in a few weeks cause of transmission issues.
Old 09-04-2008, 12:10 AM
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How does the pedal feel? Was the flywheel machined?
Old 09-04-2008, 04:36 AM
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The pedal feels great. Probably a little bit firmer than stock. As for the flywheel, its a brand new Ram billet steel flywheel so it shouldn't have needed it.
Old 09-04-2008, 08:15 AM
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Do you have a shifter with Stops on it? The "new" transmission may have a different throw, and any/all shifter stops should be backed all the way out.
Old 09-04-2008, 01:37 PM
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Originally Posted by 85MikeTPI
Do you have a shifter with Stops on it? The "new" transmission may have a different throw, and any/all shifter stops should be backed all the way out.
Yeah, I've got a B&M Ripper shifter but I already backed the stops out. The transmission was shifting fine when it was out of the car so what could be keeping it from shifting with it installed, even with the car off?
Old 09-04-2008, 02:11 PM
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Did you replace the shifter cup?

https://ls1tech.com/forums/showthrea...ht=shifter+cup
Old 09-04-2008, 02:21 PM
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Originally Posted by 85MikeTPI
Yep, I swapped out the one from my old t56.
Old 09-04-2008, 05:12 PM
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I just talked to my buddy and he thinks the input shaft is seized in the pilot bushing. Even if that was the case it wouldn't stop me from putting it in gear with the car off, would it?
Old 09-05-2008, 01:41 PM
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Got it fixed this morning. I don't know if it just needed to sit or what but I could actually get it into gear with the car off. It still wouldn't go in with the car on no matter how much I bled it. Finally, I put it in reverse, started the car up and to my surprise it didn't pop out of gear and the car didn't jump forward either. So I let the clutch out and it actually started creeping. I don't know if the clutch disc was hung up or what but it works fine now.




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