Need help with custom 4 link rear -
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post #1 of 6 Old 01-23-2010, 01:40 PM Thread Starter
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1998 XJ Cherokee 
Join Date: Jan 2010
Location: Washington
Posts: 10
Need help with custom 4 link rear

I'm looking to do a custom 4 link rear (Trek's, Rock Krawler and Clayton's are too expensive) set up on my xj and I don't know how to figure out the lengths for the LCA's and UCA's

Also I want to do a triangulated setup so I don't know what angles the control arms need to be at coming from the axle and mounted to the cross member

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post #2 of 6 Old 01-23-2010, 02:58 PM
XJ on 37's
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1998 XJ Cherokee 
Join Date: Jul 2006
Location: missouri via blackpool,lancs.
Posts: 10,625
This is why they sell the kits IMHO.
They do all the homework, and you weld it in. There are a LOT more things to dial in on a 4 link than anything else.
I would recommend going over to Pirate4x4.Com - The largest off roading website in the world. and reading on there. They also have some anti squat calculators and such.

To be honest, and please do not take this the wrong way, if you are trying to figure angles and link length out, I do not think you are ready yet to do a home made 4 link.
Pretty much all the successful home made 4 link setups I have seen in person, went into the cab area on XJ's. There just is not enough room under them for the length of links you need.
Please go and do a LOT of research BEFORE starting this, as done wrong it will be a death trap.
may I also ask why you are dead set on a true 4 link rear? For a fraction of the cost, even doing it all yourself, you can have custom leaf springs made that will ride like a dream.


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 #3 of 6 Old 01-23-2010, 03:08 PM Thread Starter
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1998 XJ Cherokee 
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Location: Washington
Posts: 10
I understand what you mean about me trying to figure out the angles and lengths but you have to start some where with a project like this, I'm not looking to get it done for another 6 months, and I've done plenty of XJ's before, I want to try something new..
And yes I'm doing/have done a lot of research, I have a buddy who owns a shop where I am located who will do all the fab work for me.. Who knows I may just buy a kit but I really like the 4 link. and to answer your question as to why I want the 4 link, I want something that is different and will stand out..
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post #4 of 6 Old 01-23-2010, 07:38 PM
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1999 XJ Cherokee 
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Location: ridgway pa
Posts: 146
Suspension calculator, tape measure and an angle finder. That being said if you have to ask then your not ready to build one. Not to discourage you from learning but there is a LOT more that goes into building a suspension than you may realize.and I'm sure you don't want to kill yourself or anyone else.
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post #5 of 6 Old 01-24-2010, 12:51 PM Thread Starter
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I do realize that there is a lot of work that goes into it. I just don't see how I can learn it without doing my research and then having someone build it for me.
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post #6 of 6 Old 01-24-2010, 12:57 PM
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1987 XJ Cherokee 
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I love JF and it has taught me more than any other forum on the web about Jeep stuff. The people here are great and know a lot.

But if you want to talk about 4link you might want to try Modified Tech Discussion - NAXJA Forums -::- North American XJ Association

Those guys are like crazy technical super weirdos or something.

'87 XJ Pioneer with 32" KM2s, etc.
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