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

clutch wont disengage

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Old 04-08-2015, 04:08 PM
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So my Ls1/T56 combo is in a Fc Rx7. It was a running driving swap prior to me dropping the trans to replace the input seal. After shoving everthing back together i couldnt get it in gear. So i replaced the slave cylinder and put the shim that was on it. Ive mity vac bleed it, classic pump method pretty much tried everthing i saw on forums and have run out of ideas. This was working just fine so i cant believe it would be the master/flywheel/clutch.... ideas?
Old 04-08-2015, 04:09 PM
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Also the trans is just fine, goes in gear and i can spin both shafts freely while its out.
Old 04-09-2015, 05:58 PM
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Well you've got something put back wrong. Hang in there, somebody will drop in and help out.
Old 04-09-2015, 06:09 PM
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Sounds like your master cylinder went out... its most likely not able to move enough fluid to actuate the slave. Probably a good time to upgrade to an aftermarket one though Im not sure what would fit your application directly.
Old 04-12-2015, 10:00 AM
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I currently have a wilwood. Has really good pedal feel. However i have already purchased a new one just in case.
Old 05-01-2015, 09:35 AM
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Installed a new MC, measured and installed a bigger shim. Bleed the hell out of the system every recommend way on the Internet....still will not work.
Old 05-01-2015, 12:35 PM
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I hate to ask as many times as you've been under there, but are you seeing any fluid leaks when you pump or an assistant pumps the pedal - something to indicate the slave blew a seal and isn't moving the clutch?

It almost sounds like something in the pressure plate or friction disc got bent or broken. The hydraulics aren't that complicated, and you've got good feel, which means you have resistance. However, you've had it apart twice, and I would think you would have noticed that - you seem to know what you are doing.

Maybe a small piece of something fell in there and is preventing the friction disc from moving? Maybe the pilot bearing backed out a bit and is halting the friction disc?

I'm only guessing at straws like you are, but it really sounds like something you will need to tear the whole clutch down and it will probably be something very obvious once it's apart, but invisible while assembled.
Old 05-01-2015, 03:24 PM
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I plan on pulling the clutch tonight. No fluid leaks and it holds a mity vac vacuum for hrs with no bubbles. I guess we will see. Prob just gonna grab a stock clutch setup from an auto parts store and see if it works.
Old 05-01-2015, 05:31 PM
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Wish I could have given you a bulls-eye, but it sounds like all I did was confirm your suspicion that you'll just have to pull it apart and look. Sorry wasn't much help
Old 05-02-2015, 11:11 PM
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Turns out the clutch had fuzed itself to the pressure plate.
Old 05-03-2015, 07:48 PM
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Dude, that sucks. thanks for posting back what it was. Did you decide to put a stocker back in?



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