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Old 05-21-2014, 08:42 AM
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Slave cylinder replaced, problem not resolved.

Hello all,

I have been reading up on this forum for quite some time now. I have been searching for a fix to an issue that recently just started for me about two weeks ago with my 1999 TJ sport.

The problem is mostly obvious when I am in a situation where I am working the clutch a lot, lets use a parallel parking situation for example. So reversing in to the spot, then pulling up and reversing one more time.

What happens is that usually after multiple successive gear changes (reverse then first then back to reverse), the clutch engages immediately after lifting my foot slowly off of the clutch pedal, so extremely low to the floor. The pedal does not return as it should and the jeep is stuck in whatever gear I was in. The engine bogs ultimately resulting in me turning it off.

Once I shut the jeep off, I can then pump the clutch pedal a few times (3 or 4) and it returns with full pressure, I can then pull out of the gear I was stuck in and everything works normally as it should.

Based off of some information I was able to find on this forum I deduced that it was probably my slave cylinder, so I replaced with a new slave, bled the lines a bunch of times and all was well. When I wrapped up the tools and buttoned up the jeep I took it for a test drive which resulted in me finding out that the problem was not resolved.

My obvious next step is to replace the master cylinder which I plan on doing this coming weekend, but wanted to know if based off of what I am describing there is someone who may have experienced the same issue and could give me any info, tips, or pointers on what else it could be.

With that being said, I also want to add that the clutch was replaced with a new clutch 3 years ago, the clutch itself feels strong never slips, and after testing it to see if this could all be stemming from the clutch I do not think it is. Ultimately I am losing pressure somewhere ( no leaks found, not losing fluid, did pull rubber plug also lol) PLEASE HELP...
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Old 05-21-2014, 09:30 AM   #2
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It sounds like you have pretty well nailed it down to either the master or still have air in the system. The oem clutch hydraulics are installed as a unit pre bled and filled including the master, slave and interconnecting line. When I replaced mine (since I didn't know whether it was a slave or master problem) I replaced the whole thing (from Napa) as a sealed unit and am glad I did. If I had to do it over, I would do it the same way.

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Old 05-21-2014, 11:02 AM
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When I bought the slave, I wasn't aware of the issues yet with bleeding etc. Maybe I'll just go and buy the entire unit rather than buying the master and having a hell of a time working the air out... Thanks for the reply Water Dog!
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99tj , clutch , master cylinder , slave cylinder , transmission

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