New Internal Slave, Clutch still has no pressure - JeepForum.com

 
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post #1 of 11 Old 03-30-2013, 05:02 PM Thread Starter
PeterSyz
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1992 YJ Wrangler 
 
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New Internal Slave, Clutch still has no pressure

I have a 92 YJ 4.0 with hydraulic clutch. The internal slave cylinder stopped working about a month ago so I pulled the tranny in my driveway. After a while, the slave was replaced and tranny was back in.

A week later (today) I'm getting gas and leaving the gas station, the clutch pedal goes straight to the floor. Fortunately, I pumped it and got enough pressure to get home.
It's leaking fluid from the bell housing and it leaks quite a bit. Its hard to believe that its a bad slave...Anyone think they might be able to help?


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1992 4.0L YJ | Pennsylvania
1998 5.9L ZJ | Kansas
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post #2 of 11 Old 03-30-2013, 05:33 PM
Berniebikes
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could be a bad slave, or could be the line came loose from the connection to the slave. Are you sure the fluid being leaked is hydraulic fluid and not oil or transmission fluid? If you are sure it is hydraulic fluid (i.e., brake fluid in the clutch assembly) the only way to tell where it is coming from is to pull the tranny again. Sorry for your pain but if you have taken it out once then it isn't that bad doing it again. Make sure that the little pins that hold the lines into the slave are secure when you put it back together again.
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post #3 of 11 Old 03-30-2013, 06:10 PM
bigbossd1030
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It's a leaky slave or leaky hose. ^^^ is right, you will have to pull the tranny again. Find out what is leaking and replace as necessary. Sorry for the bad luck, but it does happen to people, bad parts out of the box. If the fluid is dirty, then it's leaking for sure.

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post #4 of 11 Old 03-31-2013, 01:40 AM
WidowYj91
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Its most likely the cutch master cylinder. I had the same problem after my new clutch kit. Replace that and I'm good to go.

'91 YJ,2.5L, 5spd, 1.25" BL, O.M.E 36r springs, 32x11.50 km2's,
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post #5 of 11 Old 03-31-2013, 08:32 AM Thread Starter
PeterSyz
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I replaced the clutch master before I replaced the slave because that's what I thought was wrong. Everything from the clutch master to the clutch is new except for the hoses and bell housing. I think I'm just going to pull it again and spend the money to convert to an external slave.

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post #6 of 11 Old 03-31-2013, 09:07 AM
Old4X
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What brand slave did you get? Many of the aftermarket units from places like autozone, O'reillys, etc are junk.

OEM, and LUK are GTG.

418 miles on 19 gallons of gas. Can't beat the BBD !
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post #7 of 11 Old 03-31-2013, 09:50 AM
bigbossd1030
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Quote:
Originally Posted by WidowYj91
Its most likely the cutch master cylinder. I had the same problem after my new clutch kit. Replace that and I'm good to go.
Not if its leaking from the bell housing.

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post #8 of 11 Old 03-31-2013, 09:51 AM
bigbossd1030
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Quote:
Originally Posted by Old4X
What brand slave did you get? Many of the aftermarket units from places like autozone, O'reillys, etc are junk.

OEM, and LUK are GTG.
X2

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l----L-[]lllllll[]-
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post #9 of 11 Old 03-31-2013, 11:45 AM
WidowYj91
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Quote:
Originally Posted by bigbossd1030 View Post

Not if its leaking from the bell housing.

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My slave was leaking from the bell housing also but I didn't fix the pressure loss problem until I replaced the master.

'91 YJ,2.5L, 5spd, 1.25" BL, O.M.E 36r springs, 32x11.50 km2's,
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post #10 of 11 Old 03-31-2013, 11:54 AM
bigbossd1030
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Quote:
Originally Posted by WidowYj91

My slave was leaking from the bell housing also but I didn't fix the pressure loss problem until I replaced the master.
Your problem was different than the op. Your sc was leaking, you then replaced. Then you discovered that your mc was shot. Your entire hydro system had to be serviced. If the slave cylinder is leaking it will allow air into the system, causing pressure loss. Same with the master cylinder. If there is a leak in the bell housing, it's obviously leaking from the sc. If there is a leak on the firewall, then its the mc. Replace the sc to fix the leak. If the pressure problem persists, there are multiple tests one can do to determine what it is. Don't just jump to throwing parts at it, this will solve nothing. And will be expensive. Plus he already did the mc before.

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post #11 of 11 Old 04-01-2013, 05:42 AM Thread Starter
PeterSyz
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Quote:
Originally Posted by Old4X View Post
What brand slave did you get? Many of the aftermarket units from places like autozone, O'reillys, etc are junk.

OEM, and LUK are GTG.
Yeah it was a Duralast sc from Autozone. I'm going to the dealership today to see how much they're going to charge for a factory one. If that's crazy, I'll go online to see. And yes, the mc was the first one I changed because it was leaking at the firewall. It was fine for about 3 days until the sc broke.

Thanks for the advice everyone!

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1992 4.0L YJ | Pennsylvania
1998 5.9L ZJ | Kansas
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clutch , cylinder , slave cylinder , transmission , YJ

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