Slave cylinder internal or external?

[Herada12]

Sorry for a million questions, but I can't find an answer!

 

I just picked up an 89 comanche 4wd. The previous owner gave me a new slave cylinder but I believe it may be for an earlier model. There isnt one on the truck right now but rhe one he included fits the trans.

 

My problem is, the factory line from the master is a hosr with a metal and and a nut to thread it together! Not the plastic like the new one uses.

 

So did someone swap the trans out with a newer one that uses the external slave? Did the original trans use an internal?

[87MJTIM]

You did not say if you have a 6 or 4 cylinder.

 

If a 6, then the trans came with an internal slave. (I don't know if the 4s were int or ext.)

 

I'm not sure I understand the hoses you describe, though. Pictures would help.

[Herada12]

It has a 6 cylinder sorry for that. So here's the master cylinder that is on the truck. Take notice the metal line running off the top of it!

 

[Herada12]

Here is the slave cylinder currently bolted to the tranny with the plastic line cut off of the back!

 

[Herada12]

Here is the slave that he gave me. Same as the one on the trans!

 

[87MJTIM]

It looks like the PO did a conversion for the bell housing to the external.

 

89 was a change over yr from the BA10 to AX15.  The truck may have come with an AX15. But the AX15 would have come with the internal slave.

 

However, the slave looks like it came off of an "all-in-one" master/slave system.  The master cylinder looks like OE.  My guess (and it is just that) is the PO slapped the slave on there to cover up an incomplete hydraulic system. 

[Herada12]

And here is the hose with the metal end on it. If you pull it towards the slave it looks like it hooks to it. Just not the one thats on there!

 

[Herada12]

So then what are the chances of me buying a master/slave combo and just replacing the whole thing? I wonder if it will bolt to the firewall!

[1987Comanche]

For some reason he left that internal to external slave conversion 85% finished and walked away.  From where you are it's quite easy to finish up.  You need the plastic hard line that runs from master to slave and a master cyl that's compatible with the hard plastic line.  The master is easy to find but the hard line is used only as far as I know.   I have a spare external slave setup squirreled away for a rainy day.  PM me if you need more info.  

[1987Comanche]

Pg 4 of Georgia's build thread has a photo of the external master/slave assy with the plastic line. It's laying next to the external slave 4WD trans I picked up.

 

http://comancheclub.com/topic/37173-georgia-92-40-ho-ax-15-2wd/page-4

[Herada12]

Thanks alot! I guess I'll be looking for a whole setup.

[87MJTIM]

Rockauto has one for $120.  When you search for the assembly, be sure to specify it is for a 94+ Jeep, 6 cyl, AX15.  If you specify for a pre-94, they will try to sell you the internal slaves.

[Eagle]

I just posted in your thread about "What sensor is this?" That is the newer, external slave cylinder, and it is NOT OEM for an '89 MJ. This confirms my guess that the previous owner swapped in a newer engine, apparently with the clutch and probably the transmission all together, and then couldn't get it to run.

 

There is a way to connect your master cylinder to that slave, but it's strictly a do-it-yourself setup. A number of years ago, and the annual NACFest off-road weekend in Pennsylvania, one of the guys with a '94 XJ had the plastic line from the master to the slave melt and rupture. He's a good driver, and he made it back to the campground with no clutch. He and another of the guys went into town, caught the local auto parts emporium just before they closed, and bought a bag full of miscellaneous fittings and a length of steel brake line. It took them a couple of hours, but they did come up with a combination of parts that worked -- and the steel line won't melt!

[Herada12]

Well I'm actually starting to put this together now. I think the previous owner swapped the tranny and transfer case. Becuase I have some issues with my shift linkage for my 4 wheel drive too. I'll slowly get this figures out.