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Old 02-25-2010, 06:04 AM   #1
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yj clutch problem

i have a 93 wrangler yj and i had a cluch put in about a year ago and also the slave and master cylinder and the clutch over a few days looses pressure or something like that.. i will bleed and it will be so you have to let the peddle all the way out to disengage then it will be so you can not get it into gear because you can not press the clutch peddle far enougth cause its at the floor.. it does not loose any fluid out of the reservoir in that time idk what it is... any help... its annoying having to stop on the side of the road to bleed it quick...

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Old 02-25-2010, 09:45 AM   #2
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My first guess would be that one of the three parts of your hydraulic system is faulty. Either the master cylinder, slave cylinder, or the hose that runs between the two. One of the cylinders could have a bad rubber seal letting pressure by. The hose could have bad o-rings on it. The hose could possibly have an aneurysm (swelling of one section of the hose). Check for leaks also, might point you in the right direction. I'm not a mechanic by any means, so if it's not one of those, someone else is gonna have to chime in. Good luck!

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Old 02-25-2010, 09:47 AM   #3
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I replaced the master cylinder and it was bad from the factory, replaced it again and it worked fine.
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Old 02-25-2010, 12:12 PM   #4
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If its not loosing fluid, I would make a guess that its the master cylinder leaking by internally.
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Old 02-25-2010, 01:59 PM   #5
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Quote:
Originally Posted by Garyk View Post
If its not loosing fluid, I would make a guess that its the master cylinder leaking by internally.
This also happened to me. So where the heck does the fluid go?
My oil was never cntaminated.
No leaks on the ground.
No spray or nothing on the undercarriage.
No spray interor of the wheels.
Does it accumulate in the tranny somehow? If the answer is yes doesn't that contaminate the trans?

I re-bled the slave and it's holding all fluids now and driving fine so I guess I can't complian...but I'm still scrathing my head...
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Old 02-25-2010, 02:56 PM   #6
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That is the exact same problem I am having right now. I took it into the shop this morning and had them look inside the clutch housing with the little scope thing and it was dry, no brake fluid anywhere inside.
I too replaced my master cylinder. They bled it again for me, I have good peddle. Typically, in about a week, it'll be back to no pedal and shifting very stiff.
I am thinking if there was a leak somewhere, it would not bleed out at all. Like a brake line, right?
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Old 02-25-2010, 09:39 PM   #7
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If its the master cylinder leaking by internally, the fluid does not go any where but past the seals internally and you loose pressure...if its a rebuilt one, that could by your problem, parts store should take it back. Hydraulics can be a real pain in the ass. We bled the front brakes on an open wheel modified race car for two hours and could not get a pedal....turned out to be a brake pad that was bad and hanging up.
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Old 02-26-2010, 04:22 PM   #8
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I talked to a guy last night that had a similar problem. He said sometimes you have to hold the Master Cylinder (m/c)with the reservoir tilted up so the air can seep out.
I think this is what Garyk is saying, the air bubble will have no where to go inside the m/c, it just displaces fluid.
Has anyone ever tried this? Do you hold it on an angle then push the plunger to bleed the m/c?
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Old 02-27-2010, 10:41 AM   #9
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ok idk im stumped becasue it does not loose any fluid what so ever and it just looses pressure but i think there is a leak somewhere along the line where it is letting a little aair in but no fluid to leak out because whenever i bleed a little air comes out so.. and ik every time i bleed i get it all!. but thanks everyone for your inputs i appreciate it!
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Old 03-05-2010, 05:04 PM   #10
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It's been a week since I had the clutch bled and it's holding pretty good. I think I didn't bleed it good enough to get all the air out when I changed the master cylinder. So I think mine is good.
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Old 10-22-2010, 01:35 AM   #11
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When you change a master cylinder you should do a bench bleed. Put you master in a vice, fill the resivoir, and put a tube of sort in the output of the master. Then actuate the rod. Keep an eye on the fluid level. After the fluid comes out clean and air free, top off the resivoir, cap it tight, and install on vehicle. Then bleed again. this is how old mechanics would do it years ago.

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