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Unread 03-30-2004, 10:55 AM   #1
Tshark299
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1987 YJ Wrangler 
 
Join Date: Mar 2004
Location: Upstate NY
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Internal vs. External Clutch Slave

From what I hear, the external clutch slave is much less labor intensive to replace when (not IF from what I hear) it goes.

My question is other than the difficulty of replacing the slave, is there any difference between the reliability between internal and external?? Does one fail more ofter than the other?

I can probably get a smokin' deal on a beat '91 XJ with 4.0L HO, AX-15, and NP-231 to use at least for its trans/t-case to replace my BA-10/5 / NP-207... Would it be possible to pick up anything from a j-yard to convert this '91 AX-15 to the later '94+ external slave??

Thanks for any input.

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'87 YJ Laredo - 4.0L, AX-15, NP231, 4.10s: 3.5" BDS, 31" Muds

'95 XJ - Donated drive train to the YJ, Parted out the rest

'51 CJ-3A - Buick 225 V6: Painless Wiring Harness, Warn Overdrive & Hubs, 2" Lift, 31" Muds
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Unread 03-30-2004, 10:10 PM   #2
sentinal02
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1992 YJ Wrangler 
 
Join Date: Feb 2003
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Quote:
Originally Posted by Tshark299
From what I hear, the external clutch slave is much less labor intensive to replace when (not IF from what I hear) it goes.

My question is other than the difficulty of replacing the slave, is there any difference between the reliability between internal and external?? Does one fail more ofter than the other?

I can probably get a smokin' deal on a beat '91 XJ with 4.0L HO, AX-15, and NP-231 to use at least for its trans/t-case to replace my BA-10/5 / NP-207... Would it be possible to pick up anything from a j-yard to convert this '91 AX-15 to the later '94+ external slave??

Thanks for any input.
as far as reliabilty, I don't think one is better then the other. only thing is, if the new slave is bad when you put it in there, the tranny needs to come back off again. not too bad really, just HIGHLY annoying. No doubt the external is the better way to go. I have heard of people doing a conversion on the older trannys to allow for an external slave, but I don't know the specs off hand myself. you might search Pirate for it, I'm pretty sure that's where I read about it. If i remember right, you need the fork from an external model, the new slave and you may have needed to fab your own support for something. I'm not sure. Sorry I can't be more specific.
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RIP: '88 YJ 2.5L Ax-5 NP231
Posi-Loked. Herculined. Optima yellow top. 1" Shackle, 2" BDS. Cragar 397's Aussie front.

92 YJ 4.0L Ax-15 231
5" springs, 1" shackle 31's or 35's depending on my mood
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Unread 03-30-2004, 10:23 PM   #3
GreenReaper93
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I tried to do the conversion with my '93 YJ. My only reason for failure is that I couldn't find all the parts in time. You'll need the bellhousing from a '94+ AX-15, the throwout bearing, the pivot cup, the throwout fork, return spring, and the external slave from what I remember. There's no real need to fab a support for the External Slave (unless you want to try and beef it up for an extreme case - can't see how, but anything's possible). External is much better. Parts can be hard to find at times for the swap, but if you have a line on parts I'd do it! Good Luck!
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