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Unread 07-08-2013, 07:13 PM   #1
90JeepToy
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Join Date: Jul 2013
Location: Troy, PA
Posts: 3
Clutch Problems after swap

I have a 1990 YJ Jeep Wrangler with a 4.2L AX15 with the small input shaft. I put in a Chrysler 318 LA small block. With a bellhousing, throw out bearing and flywheel from a 92' dodge dakota 3.9L. I used the original clutch and pressure plate from the 90' 4.2L. Everything is hooked up and running but when I use the slave cylinder from the dakota the clutch doesn't work at all. I tried a bleedable slave cylinder for a 94' Jeep Wrangler 4.0 The clutch pedal feels full but it release 1" off the floor. Tried different lengths of rods in the slave cylinder to bring the clutch up off the floor more but nothing has worked. Any ideas of what I can do?

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Unread 07-08-2013, 07:34 PM   #2
greyarea
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1990 YJ Wrangler 
 
Join Date: Aug 2009
Location: gwinett, GA
Posts: 293
I just got my wwap done today thith the same setup only it was a magnum 318. today must be a bad day for clutches, my new slave is leaking. mine just is starting to bite 1'' off the floor and is fully engaged with another 3-4'' of travel with 1'' of free at the top. I am using a 11'' late model 318 clutch and flywheel. What are you using for a pilot bearing?
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90 YJ Magnum 5.2 v8 , 1'' BL, 1'' booms, 4" Procomp, 35/12.50-15 MTR/kevlar Ford 8.8 4.10 lsd Aussie and TJ shafts up front.
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Unread 07-08-2013, 08:34 PM   #3
90JeepToy
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I bought a pilot bushing through Novak Conversions. You might not have enough reach using the 318 flywheel and pressure plate because the hat in the pressure plate is too shallow. I ruined 2 slave cylinders before figuring this out... lol
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Unread 07-09-2013, 11:29 PM   #4
greyarea
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1990 YJ Wrangler 
 
Join Date: Aug 2009
Location: gwinett, GA
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What master are you using? I am using a 95 yj master with the operating rod cut off my original and welded on to the 95. The oal is about 3/8'' longer than the 95 was to start. I will check the throw of the slave but I think I just got a bad slave as the boot was wet when installed.
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90 YJ Magnum 5.2 v8 , 1'' BL, 1'' booms, 4" Procomp, 35/12.50-15 MTR/kevlar Ford 8.8 4.10 lsd Aussie and TJ shafts up front.
KI4UTU
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Unread 07-10-2013, 06:43 PM   #5
90JeepToy
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Location: Troy, PA
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I'm using the original master. I got the clutch to work a little better by putting a 3/4" longer rod in the 94' slave driver. Seems to work it releases half way up now but it chatters a little bit when you down shift and let it out.
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