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Unread 04-12-2013, 09:01 AM   #16
jefflp
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1993 YJ Wrangler 
 
Join Date: Apr 2013
Location: evansville, in
Posts: 5
sometimes those bands wont break might have to reach in after you bleed it a little and pop them of if they don't the reason they say leave them on is so the slave doesn't open too far and break the seals inside if this happened it would explain the symptoms (speaking from experience)

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Unread 04-12-2013, 09:32 AM   #17
Destr0
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1994 YJ Wrangler 
 
Join Date: Apr 2009
Location: Hebron, IN
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I could never get my MC SC to bleed properly (94 with external slave)- I took back the AZ junk and bought a complete pre-bled system from RockAuto. No issues and wish I had done that the first time- I spend a long time trying all the different ways the internet said to bleed the system with no luck.
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Unread 04-13-2013, 01:16 PM   #18
ign_cas
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1991 YJ Wrangler 
 
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Ok guys. So, I bought a Luk master cylinder and installed it yesterday. After installing it and bleeding the slave, it worked perfect........until I drove it on the freeway. My clutch pedal began to get lower and lower and lower until I had no pressure. The different thing about it now was that I was that, if I pumped the brake pedal a lot, I was able to gain a little bit of pressure back (about 1/4 of the pedal).

Zeus: Can you or anyone else explain how to bench bleed the master cylinder of these? Because its not the type of fitting the you can screw on. It's the fitting with the slave to hold in the line.

I really don't want to drop the transmission unless I have to (internal slave). Any other ideas of what it can be besides the slave?

I don't lose any fluid, so I don't think I have a leak. The level of the reservoir stays the same. Thanks guys.
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Unread 04-13-2013, 01:27 PM   #19
87TPIYJ
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1987 YJ Wrangler 
 
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Location: Jacksonville, Florida
Posts: 768
It's got to be your slave cylinder. It could have an internal leak. If you had air in the line it would have never worked right.
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Unread 04-13-2013, 01:31 PM   #20
bigbossd1030
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1995 YJ Wrangler 
 
Join Date: Feb 2010
Location: Edmonton, AB, Alberta
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Quote:
Originally Posted by ign_cas
Ok guys. So, I bought a Luk master cylinder and installed it yesterday. After installing it and bleeding the slave, it worked perfect........until I drove it on the freeway. My clutch pedal began to get lower and lower and lower until I had no pressure. The different thing about it now was that I was that, if I pumped the brake pedal a lot, I was able to gain a little bit of pressure back (about 1/4 of the pedal).

Zeus: Can you or anyone else explain how to bench bleed the master cylinder of these? Because its not the type of fitting the you can screw on. It's the fitting with the slave to hold in the line.

I really don't want to drop the transmission unless I have to (internal slave). Any other ideas of what it can be besides the slave?

I don't lose any fluid, so I don't think I have a leak. The level of the reservoir stays the same. Thanks guys.
Slave for sure, there are only two pieces that can malfunction in the hydro system that can cause pressure loss. Well three I guess. The hose mc and sc. If there are no leaks at all, it has to be either the mc or sc. Seeing as how you replaced the mc more than once, by process of elimination, the sc is all that is left. I know you don't want to hear that the tranny has to come off again. But it's all you can do.

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Unread 04-13-2013, 03:18 PM   #21
4.7stroker
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The one and only fix for the stupid internal slave is to throw it away and convert to an external slave.
Once done you will never have another clutch master/slave problem that requires dropping the tranny.

Dwayne
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Unread 04-13-2013, 03:59 PM   #22
Siva283
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1995 YJ Wrangler 
 
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Tour slave can pull air in without leaking fluid out. Its rare but it happens. Replace the slave. Its all that's left anyway.

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Unread 04-20-2013, 02:17 PM   #23
ign_cas
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1991 YJ Wrangler 
 
Join Date: Mar 2009
Location: San Diego
Posts: 32
I'm in the middle of changing my slave. The trannys down and slave is out. My problem now is how Dow I remove the plastic connector? The cylinder plug that connects the slaves metal line to the main plastic clutch line? Thanks guys.
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Unread 04-21-2013, 07:57 PM   #24
ign_cas
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1991 YJ Wrangler 
 
Join Date: Mar 2009
Location: San Diego
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Fixed my car. Turns out it was the slave cylinder. I took it out and compressed it and some liquid came out from the middle. So it was leaking a little and allowed air to come in I assume. Thanks for the help guys.
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