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Unread 08-13-2011, 07:59 AM   #1
kirklin
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1975 CJ5 
 
Join Date: May 2011
Location: crystal lake, il
Posts: 173
Yj leaf spring mod on 75 cj5

Im getting ready to order my lift kit for my jjeep build and wanted to do the leaf spring mod I have been doing so serching but cant find were any one has done it with my year any info or helpful words would be great

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Unread 08-13-2011, 09:22 AM   #2
M1A1TankerTom
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Join Date: Sep 2007
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my 68 has YJ springs, but the OP installed them so I am not much help to you. Ill try and snap some pics for you this weekend if I get time.
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Unread 08-13-2011, 09:57 AM   #3
M1A1TankerTom
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also thought I would post this for you...might help

http://www.rocky-road.com/cj-to-yj.html
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Unread 08-13-2011, 10:28 AM   #4
TxJeeper20
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1982 CJ5 
 
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Location: Arlington, Texas
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so you can just bolt the YJ springs into a newer CJ?

my springs are sagging I know I can rearch them but dont know if its cheaper to find and adapt YJ or new cj springs versus rearching lol
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Unread 08-13-2011, 12:58 PM   #5
kirklin
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Great info thank you and if you can do the pictures that would be great
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Unread 08-13-2011, 12:59 PM   #6
kirklin
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1975 CJ5 
 
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Location: crystal lake, il
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Txjeeper this thread will give you some info on your year
http://www.jeepforum.com/forum/f8/ol...stall-1245523/
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Unread 08-13-2011, 01:05 PM   #7
nshefbuch
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On a 75 the springs are narrower than the later cj. Later cj had 2.5" wide springs on rear as yj did. Since yours are narrower you may need to change things like axle perches and or spring hanger/shackle mounts. I'm not sure they make conversion shackles for your idea.
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Unread 08-14-2011, 07:08 AM   #8
billybob535
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Here you go: http://www.earlycj5.com/technical/sp...ng-conversion/

You will end up changing all 4 spring hangers and all 4 shackle hangers. The front spring hangers attachment points sit inside the boxed section so they are a bit hard to get to. Since the rest of the frame is open channel on the 75 they are not too hard. You will bolt the new shackle and spring hangers in place with grade 8 hardware, mount a spring to make sure they are straight, tack weld them, remove the spring, then finish weld them. Some people do not weld them but that's not recommended especially with the flexibility of the intermediate CJ frame. You will need new shackles (rear CJ ones seem to be the most recommended), replacement u-bolts, and you will have to widen the holes on your spring plates (search the forum on this as the holes need to be moved in 2 directions for both the wider spring and thicker replacement u-bolts). Of course you will need whatever springs you are going to use with correct length brake lines and appropriate length shocks that fit a CJ. The Old Man Emu 2.5" YJ spring is highly recommended and if you dig around on the forum you can find the part number for the correct CJ shocks. Some people keep the 1.75" wide axle perch and some cut them off and weld on new 2.5" wide ones. If you were wheeling the hell out of the jeep I would change them otherwise I would leave them be.

Good Luck

Bob
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Unread 08-14-2011, 02:40 PM   #9
kirklin
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Awsome thank you thank you
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