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Unread 03-17-2012, 09:29 PM   #1
sterdest
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Suspension mounting points

Here's the deal...I'm trussing a d dana 44 for the front of my cherokee and I have future mod questions. I have a six inch long arm lift on it right now that came on it. I want to change that to a four link eventually. Here's the question part, I am wondering if it will be the same mounting points on the axle for a four link as it is for the long arm. And would doing a triangulated 4 link be different? Thanks

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Unread 03-18-2012, 07:47 AM   #2
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If you're wanting to do a 4 link, you'll need enough triangulation in the system to keep the axle laterally constrained, so triangulation is a given. The stock mounting points for the lowers 'could' work but they're too low for good geometry, especially at that height. Additionally, you'll likely have a small amount of triangulation in the lowers and you'll want the mounts to be at that angle to prevent binding. I run a 'single triangulated' setup with 10* lowers (wider at axle with the frame mounting points inside of the frame rails) and 25* uppers. The stock upper frame mounts will certainly not work, nor will the axle mounts. Your best bet is to cut everything off and start fresh.
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Unread 03-18-2012, 09:20 AM   #3
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Ok thanks
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Unread 03-18-2012, 09:14 PM   #4
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All those designs require different kinds of mount points, locations and angles. fitting a triangulated for link in the front of a cherokee is not easy. I suggest some pirate build thread reading.
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Unread 03-19-2012, 07:40 AM   #5
sterdest
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Will do. Thanks
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Unread 03-19-2012, 09:17 AM   #6
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To add to it--a 4 link setup in the front means you're no longer using a track bar to do the lateral constraining. So when your axle moves up and down, it no longer moves side to side. If you want proper behavior without constant bump steer, full hydro steering needs to be on your list. Having a drag link without a track bar is wrong no matter how 'well' you do it.

Personally, a 3 link using 2 lowers and 1 single upper + a track bar while maintaining a steering box and conventional linkage is far more appealing to me. If this will be trail-only, then do whatever you want. If you want it to drive well on the street, then go that route instead.
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Unread 03-19-2012, 09:57 AM   #7
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Hmmm. The three link sounds appealing. Right now there is nothing on the axle. I am building a truss for it and would like to incorporate the mounts into the truss. so I can pretty much go any route. I was just wondering if I could leave it long arm for now and then do something better later with the axle mounts that would be needed for the long arm. I guess I just upgrade now and be done with it. Thanks again.
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Unread 03-19-2012, 12:38 PM   #8
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I suggest you do some serious research.....there's a lot more to it than the length of the arms. Before you dive in, you really need to have a solid understanding of the geometrical terms and how those parameters are derived. Knowing the why's and how's are pretty key to building a good-functioning suspension.
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Unread 04-18-2012, 02:57 AM   #9
Loner
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Interesting

Quote:
Originally Posted by Imped View Post
If you're wanting to do a 4 link, you'll need enough triangulation in the system to keep the axle laterally constrained, so triangulation is a given. The stock mounting points for the lowers 'could' work but they're too low for good geometry, especially at that height. Additionally, you'll likely have a small amount of triangulation in the lowers and you'll want the mounts to be at that angle to prevent binding. I run a 'single triangulated' setup with 10* lowers (wider at axle with the frame mounting points inside of the frame rails) and 25* uppers. The stock upper frame mounts will certainly not work, nor will the axle mounts. Your best bet is to cut everything off and start fresh.
Sorry to hijack from OP but I'm in the process of reducing my lift and things are tight. Looking for examples of well done triangulated systems to solve some real estate issues north of the axle.

Got pix?

Just found a few of them under a different search: http://www.jeepforum.com/forum/f369/...-help-1326668/

Last edited by Loner; 04-18-2012 at 03:18 PM.. Reason: found link
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