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Jeep Wrangler YJ
YJ General Discussion
Looking to run 40s or 37s! Setup advice.
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<blockquote data-quote="Fouledplugs" data-source="post: 428844" data-attributes="member: 18666"><p>You’ll need one ton axles, or something equivalent, to support that tire size as well as much more wheelbase. With leafs, 37’s or 38’s would be a good goal to shoot for.</p><p></p><p>I was going this same exact route up until a month ago or so. 37’s-40’s on leafs. I was going to keep the gas tank under the tub instead of the popular, “in the tub,” mod. I was going to use a Genright stretch tank paired with a Motobilt stretch kit which allows the use of XJ springs in a spring over setup, gaining 6” of rear stretch.</p><p></p><p>On the front I was planning on using either XJ springs or front waggy springs to gain the stretch from the offset centerpin and hang the springs as far foward as I could while still keeping a steering box under it.</p><p></p><p>I scrapped this build plan and went the direction of coilovers and links instead of leafs recently. Using coilovers, I can place my axles exactly where I want them and not be restricted by leaf spring center pins determining my wheelbase.</p><p></p><p>if I were you, I’d stick with a 2 inch spring and 31’s. Put lockers in it, upgrade the shafts, maybe do an axle swap and get your feet wet before diving into a one ton build on 40’s. You mentioned it yourself, there are not a lot of trails where you live, so who cares? Let the trails tell you what you need.</p><p></p><p>If you want something road worthy, says Jeep on it, and can handle 40’s, get a JLU or JKU on tons. Going about this YJ build for $5k is a bit unrealistic if done right.</p></blockquote><p></p>
[QUOTE="Fouledplugs, post: 428844, member: 18666"] You’ll need one ton axles, or something equivalent, to support that tire size as well as much more wheelbase. With leafs, 37’s or 38’s would be a good goal to shoot for. I was going this same exact route up until a month ago or so. 37’s-40’s on leafs. I was going to keep the gas tank under the tub instead of the popular, “in the tub,” mod. I was going to use a Genright stretch tank paired with a Motobilt stretch kit which allows the use of XJ springs in a spring over setup, gaining 6” of rear stretch. On the front I was planning on using either XJ springs or front waggy springs to gain the stretch from the offset centerpin and hang the springs as far foward as I could while still keeping a steering box under it. I scrapped this build plan and went the direction of coilovers and links instead of leafs recently. Using coilovers, I can place my axles exactly where I want them and not be restricted by leaf spring center pins determining my wheelbase. if I were you, I’d stick with a 2 inch spring and 31’s. Put lockers in it, upgrade the shafts, maybe do an axle swap and get your feet wet before diving into a one ton build on 40’s. You mentioned it yourself, there are not a lot of trails where you live, so who cares? Let the trails tell you what you need. If you want something road worthy, says Jeep on it, and can handle 40’s, get a JLU or JKU on tons. Going about this YJ build for $5k is a bit unrealistic if done right. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Looking to run 40s or 37s! Setup advice.
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