which master cylinder - JeepForum.com
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post #1 of 5 Old 02-02-2013, 10:33 PM Thread Starter
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1975 CJ5 
Join Date: Jan 2013
Posts: 606
which master cylinder

I am doing a frame off on a 75 cj5 by myself. I swaped the disc brakes on a 78 cj5 but am now having trouble knowing what to do with the master cylinder. I know this has to have been done before, but no one where I live knows anything about it and act like I am crazy! Every part I order seems to be wrong and on and on. Been working on this thing since 2011 and getting a little tired and discouraged. Anyway enough crying. I bought a master cylinder for a 78 but the rod in the back won't fit off the 75. So do I need to get the 75 master cylinder or have they given me the wrong part again? I am pretty sure the rod on the 78 won't fit on the brake petal on the 75. Can anyone give me some kind of advice?

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post #2 of 5 Old 02-03-2013, 10:23 AM
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1989 YJ Wrangler 
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You can always swap tyhe rod end. Usually held in by some type of clip and has nothing to do with internals. I have to do that with my YJ clutch master from an external upgrade on an 89.

89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.

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post #3 of 5 Old 02-03-2013, 08:00 PM Thread Starter
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1975 CJ5 
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Thanks! That is what I was thinking but wasn't sure. My trouble is which or what rod to use or order. Noone at the parts store here has a clue. I could use the rod I have off the 75 with a different clip maybe, but I am thinking it will be too long. I guess I could cut it off, but I don't want to screw it up then need it later! Maybe I can bolt everything up and see how it fits then cut the one off the 75 off if needed. I guess I better see if the parts store can get a clip that will work first! Any thoughts on that idea?
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post #4 of 5 Old 02-03-2013, 08:05 PM
XJ on 37's
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1998 XJ Cherokee 
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Location: missouri via blackpool,lancs.
Posts: 10,625
try searching in the CJ technical forum. It has been done before countless times, so there is a way.
You may need to weld something though, like the rod etc, so be prepared for that.


1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover with a 6.0 LSx
1994 YJ, 4.3/700R4/OME SOA, etc
Western Star 4900EX 4 axle.
4.3/700r4/new frame buildup (YJ)....

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post #5 of 5 Old 02-03-2013, 08:18 PM Thread Starter
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1975 CJ5 
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Thanks! I knew it had to have been done before! I tried a search, but couldn't find anything. I am not real computer inclined though. I am so close to firing this thing up I can taste it! I am so tired of having to figure things out! It seems I spend more time trying to figure things out than getting to work on it! There isn't a piece on this Jeep that hasn't either been stripped down to the metal and repainted or replaced. If I don't get this thing going by spring where I can ride with the top off I don't know if I can make it.
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