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Old 05-26-2011, 12:09 PM   #1
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Clutch losing pressure when on the floor and sticking

Hey everyone,
For about 3 weeks now, my clutch has been losing pressure when I put it to the floor for a few seconds. That convinced me to believe it was the master cylinder. Yesterday, the clutch lost pressure and also stuck to the floor.

I'm thinking its both the master cylinder and the slave cylinder. Any thoughts?

Does anyone have an estimate on how much it costs to have the slave cylinder replaced?

Thanks

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Old 05-26-2011, 01:42 PM   #2
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Parts are around $65.00 each at the parts store.

No biggie doing it yourself. Two bolts on the slave, two on the master if I remember correctly, remove the line fittings and install in reverse. Fill with fluid, and bleed the system.

If you have a bud handy, shouldn't take more then an hour to do it.

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Old 05-26-2011, 02:36 PM   #3
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from what I understand though, my slave cylinder is inside the bell housing?

Is a "slave cylinder" the proper name for it? In my repair manual under the trouble shooting section, it says the problem could be the release bearing or binding linkage.
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Old 05-26-2011, 03:10 PM   #4
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If what you say is true, you will have to drop the tranny anyways, you can always return the parts you don't use, better to have them on hand when you start..
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Old 05-26-2011, 04:33 PM   #5
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Are you losing any fluid?
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Old 05-26-2011, 05:24 PM   #6
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So I got an estimate of $121 for the slave cylinder and I have a master cylinder. It's used but not shot like mine is, and I'll rebuild my stock one until the used one wears out.

I'm going to put my lift on then buy the slave cylinder on sunday (hopefully) and see what I can do. I hope I don't mess anything up in there.

Tyewilly, where would I see leakage out of? I notice a very small puddle of an oily substance whenever I park somewhere for a while. It looks like its coming out of the gap between the engine and the bell housing.
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Old 05-26-2011, 05:47 PM   #7
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Quote:
Originally Posted by YJman View Post
I notice a very small puddle of an oily substance whenever I park somewhere for a while. It looks like its coming out of the gap between the engine and the bell housing.
Rear main seal. If it's leaking fast enough to puddle while you're in a store... check your oil level more frequently. It's normal for aging jeeps to lose a drop every now and then from the rear main, but we're talking a drop or two a day.
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Old 05-26-2011, 08:34 PM   #8
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It's not a complete puddle but I'd say about 6, 7 drops maybe. But I never see a difference in the oil level, I check it every once in a while. I'm going to have to replace the rear main next year anyway (hopefully sooner than that actually).
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Old 05-27-2011, 03:39 AM   #9
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If it's puddling by the bell housing and you're losing pressure in your clutch, then it's probably your slave cylinder. The piece does sit inside the bell housing and yes, you have to drop the trans. That's after you drop the exhaust, pill the rear drives shaft, the skid plate, disconnect the front shaft, the shift linkage, and the wires and cables.

It should take at least 5 hours if nothing breaks and you have the right tools. My best advice is to get a trans jack from Harbor Freight. With their online coupon, the 650 lb. unit is $103 and it makes it a simple one man job. Trust me, you'll thank me later.
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Old 05-27-2011, 10:11 AM   #10
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I just changed mine last week,it was a job.The release bearing and slave cylinder are in one piece.I replaced the clutch and pressure plate too,because the complete kit only cost about 40 bucks more than the bearing/slave cyl.
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Old 05-27-2011, 10:16 AM   #11
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I replaced my slave back in December. First time around we didn't install the fittings right, and we had to pull the entire thing AGAIN. First time took us around 9 hours of work. Second time was only 2.

Easiest way to tell what slave cylinder you have is to look underneath at the tranny. If you don't see it on the outside, then you have a weekend project. If there is one sitting on the outside, then it's an easy fix. I believe the newer YJ's came with external slaves..

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