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Unread 06-26-2012, 08:45 AM   #61
jokerchief462
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1989 YJ Wrangler 
 
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I'm all good the Master Cylinder I received was for a 97 not a 94. When I went to AZ they swapped it out no questions. So now I am on my way. Results and pics to follow. Thanks.

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Unread 12-04-2012, 02:32 AM   #62
RogueAkita
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First of all thank you for passing along your knowledge, we really appriciate you. That said, I just did this conversion on my 91XJ, using a 94 NV3550 bellhousing, AdvanceAdapters slave kit #716340, NovakConversions pilot bushing #PB-7501295, front bearing retainer #4636382, release arm #5210755M, adjustable throwout bearing #TB2 and Napa Auto Parts new clutch master. Upon start up two negative effects occured, I blew out my new clutch slave and started leaking transmission fluid, both out the dust cover. I did torque to spects. I have yet to pull it all out again to see where it went wrong. My thoughts are I didnt properly seal the bearing retainer (silicone but no gasket) or any seals not mentioned I followed the thread and crossed referenced with both Hayes & Chilton manuals for all other rational Q's. All clutch hydraulics are new and all fluids new. Any thoughts before I reengage this stuff? Respectfully, RogueAkita.
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Unread 12-04-2012, 09:06 AM   #63
Opihi59
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Are you sure you were leaking tranny fluid? The sealing process you used under the front bearing retainer was correct, just need RTV, but did you put a seal in the retainer? IF you blew out your clutch slave, you'd be leaking brake fluid (also). The way this happens is if you do not have the clutch slave piston nestled properly in the dimple in the release arm; it will just launch when you press the clutch pedal.
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Unread 12-10-2012, 07:20 PM   #64
mncdriver
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Great Info!
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Unread 12-13-2012, 09:22 AM   #65
2cjs
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im in the process of doing this on my wifes 89' yj.
its been brought to my attention that on the 89 ' ,u have the 4.2.
and the flywheel is thicker for the 4.0.
the difference is 1/4 inch.
so i am going to put the 4.0 flywheel in so i wont get clutch slippage.

4.2 flywheel is 1 inch thick approx

4.0 flywheel is 1 1/4 inch. thick approx.

hope that helps fellow jeepers.
kenny
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Unread 01-14-2013, 08:25 AM   #66
ctm
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Quote:
Originally Posted by 2cjs View Post
im in the process of doing this on my wifes 89' yj.
its been brought to my attention that on the 89 ' ,u have the 4.2.
and the flywheel is thicker for the 4.0.
the difference is 1/4 inch.
so i am going to put the 4.0 flywheel in so i wont get clutch slippage.

4.2 flywheel is 1 inch thick approx

4.0 flywheel is 1 1/4 inch. thick approx.

hope that helps fellow jeepers.
kenny
Can someone please explain the difference in flywheel thickness and doing the external slave swap on a 4.2 vs. 4.0. Does it mean the new throwout bearing will not reach far enough? I have a 90 YJ with 4.2 and AX15 internal slave. I was planning on using the existing flywheel and clutch which currently only have about 20K miles on them. I have located a TJ NV3550 bellhousing and throwout lever/bearing that I can get. Can I not use my flywheel and/or clutch for the conversion?
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Unread 01-15-2013, 02:08 PM   #67
Leans93
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That post doesnt make any sense to me. Perhaps someone else will chime in and correct me if I'm wrong but a 4.0L needs the flywheel for a 4.0L and the same with the 4.2L. The flywheel is not interchangeable and is directly related to the engine and not the transmission. The CPS reads the teeth on the flywheel so it is specific to the engine. I wouldn't change mine if I were you.
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Unread 01-17-2013, 07:30 AM   #68
RogueAkita
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Well Opihi59, I found the bearing retainer seal to inputshaft was over looked. I ended up swapping the one from the internal retainer and replacing the fluid. The slave issue was as you said, on install one retaining tab was broke and over shot the throwout arm completely. Thanks to everyone here on JeepForum for building my confidence to undertake this project with success. I got chocolate mousse as a gift for christmas wrapped in my engine block, so my next project is a 4.6 stroker.
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Unread 01-20-2013, 07:11 PM   #69
mncdriver
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just finished the external swap on my yj, it had the internal ax15 swap previously. Jeep is 4.2l. New Clutch kit, throw out bearing, slave cylinder and AA adapters and line kit. Seems clutch is at the bottom of the throw. i think it should be higher. any ideas?
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Unread 01-21-2013, 06:06 AM   #70
ctm
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I wonder still if it is related to flywheel thickness. Could you bring the clutch throw higher by making some sort of adjustment on the clutch master rod to the pedal.
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Unread 01-21-2013, 03:33 PM   #71
mncdriver
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Ok, so if the throw was a 1/4 inch longer does anybody think that would help? Just thoughts off the statement made by 2cjs. Ideas?
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Unread 01-21-2013, 03:43 PM   #72
JeepinJeremy
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Originally Posted by mncdriver View Post
just finished the external swap on my yj, it had the internal ax15 swap previously. Jeep is 4.2l. New Clutch kit, throw out bearing, slave cylinder and AA adapters and line kit. Seems clutch is at the bottom of the throw. i think it should be higher. any ideas?
re-blead the system and follow AA directions with there kit. aslong as you used a 4.2 flywheel and a match clutch set for a yj/xy/tj with an ax15 external slave it should work without issue. Have done this swap many times on cj7 with 258 and early yj's.
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Unread 01-21-2013, 03:46 PM   #73
JeepinJeremy
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even if you used a 4.0 flywheel out of a yj it still works without issue. only difference is the cutouts on the ouside of the flywheel for the crank sensor. teeth are the same at 168.
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Unread 01-21-2013, 03:49 PM   #74
mncdriver
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Thanks Jeremy, I used the stock OEM replacement clutch kit for my year YJ. Again it is not "Bad" but just seems like it should be higher.
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Unread 01-21-2013, 03:55 PM   #75
JeepinJeremy
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Thanks Jeremy, I used the stock OEM replacement clutch kit for my year YJ. Again it is not "Bad" but just seems like it should be higher.
probebly just needs to be re-bled clutchs are the same minus the throwout bearing and pilot bushing.

While people are still here and reading this.

WANTED AX15 External slave bellhousing for my XJ conversion. PM me if you want to sell me one.
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