96xj4x4

hey guys, i'm hoping somebody might be able to give me any helpful ideas with my ax-15 transmission on my jeep. Last night the slave cylinder decided to crap out for the second time, so today i'm going to be putting the third one on there in 6 months

IS THERE ANY REASON WHY MY SLAVES ARE GOING BAD ON ME? i think i am installing them correctly but then again i'm no wiz

96xj4x4

bump back up to the top lol

captainofiron

no idea, where are you buying them from? are they new or rebuilt?

did you bleed the system sufficiently?

96xj4x4

Where i bought them from i suspect might be the problem but yeah there brand new, like $70 a piece if i remember correct. what i do is bolt in the new slave (two bolts) and then hook up the clutch line. to bleed i would just pump the clutch until it felt normal again, because i was under the impression that it was self bleeding but i could be wrong

96_xj

on the AX-15 the slave cylinder should not wear out that fast. when i redid my clutch at 123xxx the stock unit was working perfectly. i replaced mine out of good measure tho. i would instal a new one, then take it to a tranny shop and have then bleed it for you for like 10 buck. they might also find the reason why it is happening.

96xj4x4

you've got a good point, i def know they shouldn't be wearing out that fast....maybe i have crap in my fluid? well we'll see what happens with it.

96_xj

what exactilly is happening? like what does your jeep do when it 'goes out'

96xj4x4

the clutch pedal goes completely soft and i the trans won't shift. i can get it to shift if i refill the fluid and then kick the clutch pedal like 50 times builds up enough pressure to shift, then the clutch slowly goes away until i refill it again.

captainofiron

sounds like a leak remember its just a hydraulic system, so approach it like a brake system if the slave was a caliper/wheel cylinder

Dan4governor

do you see where you are losing fluid from? are you sure its the slave?

no this isn't the way you bleed the system. When installing a new slave, fill if up with brake fluid, then attach the line to the master and fill up the master. Then have someone watch the master cylinder (with the cap off) while you SLOWLY press the slave cylinder piston in and out until no more air bubbles surface (usually around 10 to 15 pumps). then put the plastic cap on the piston of the slave cylinder that ties into the mounting bolt holes. This keeps the piston pressed in while you mount it back onto your jeep (your new slave should come with one of these caps). then top off the master with fluid, and seal it with the cap. After the slave is mounted, pump the clutch to break the plastic cap from the ties to the mounting holes.

The way you were doing it allows bubbles to still circulate the system, eventually you will get enough pressure to allow the clutch to function, but overtime the bubbles will come back around and give you hell.
Hope this helps.

96xj4x4

you right i know exactly what your saying, somebody else explained that to me once too but i don't think i ever did it right, well i'll make sure to bleed this one the right way you explained thanks-zach

opake

Just a thought, I know the aftermarket slave cylinders have a sealed bleed screw, I had to point the slave cylinder piston straight down at the ground when I was bleeding it, or else air would build up and not allow the trans to shift between gears..