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Old 05-18-2011, 11:23 PM   #1
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Join Date: May 2011
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Clutch not working

Hey all,

So I recently purchased a '91 YJ 4-cyl and for the most part, it's been running fine. However, I tried to start it today and found that I was unable to shift out of neutral (I just get grinding). I can shift into any gear when the engine is off. If I try to start it in first gear (with the clutch pedal to the floor), it will lunge forward. So basically, I know that the clutch is not disengaging when I press the pedal.

The clutch fluid reservoir is full. With my hand to the clutch hydraulic line (near where it enters the bell housing), I can feel fluid moving if I press the clutch pedal. Also, I can easily move the line about 2 inches in-and-out of the bell housing, although I think I could do this when the clutch was working - is this normal?

My best guess is that there is some problem with the slave cylinder, or the clutch is rusted to the flywheel (I hadn't driven the vehicle for several days). Has anyone else experienced this? I plan on dropping the tranny to check things out unless someone has a simpler solution.

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Old 05-19-2011, 01:06 PM   #2
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I would suspect either the master or the slave. Unlikely that it rusted in place in that short of time, mine sat out for a year before I bought it. Typically a slave will leak when it goes out and usually the same for the master cylinder.

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Old 05-19-2011, 01:19 PM   #3
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I would agree with zero that the slave usually leaks when going out. I have been through 3 in 9 years and ever time its the seal that goes on the internal slave cylinder. Before dropping the trans I would try bleeding the system. I believe its a 1/4 inch socket/wrench. good luck
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Old 06-12-2011, 04:22 PM   #4
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Hey all,

I removed the bell housing over the weekend and replaced the slave cylinder (this is a '91, so the slave cylinder and throwout bearing are integrated). The clutch pedal feels good now, but I'm still having the same problem - the clutch will not disengage.

I figured that maybe the clutch is stuck to the flywheel, so I tried to break it loose by doing the following:
Engine off, transmission in first, clutch pedal to the floor, then crank starter. The jeep rolls forward (since the clutch isn't disengaged) and starts. I rolled along at idle, then slammed on the brakes. The engine stalled, but the clutch still didn't disengage!

I guess I'll have to pull the bell housing and pull the clutch and pressure plate, unless someone has a better idea. I've never experienced this before on any vehicle - does anyone know what else it could be? I don't think it's the master cylinder, because the clutch pedal feels as if it's compressing the pressure plate and I can feel fluid moving through the lines.

Any suggestions are appreciated.
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