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· Oh Jesus Tits....
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3,691 Posts
Discussion Starter · #1 ·
Have been tossing around the idea of a 3/4 eliptical setup on my truck. The curb weight of the truck is around 4000 lbs and uses 2.5" leaves in the rear. I have a couple old Nissan Main leaves laying around that I could cut up and use, but I don't think they're robust enough to hold up and would likely snap the first time I flexed it out. The truck is a '98 Nissan Reg Cab Frontier. Still IFS, but the front is locked and lifted, and the steering is beefed. The SAS will come one of these days, but for now, the front ARB keeps pulling the short shafts along, and I happen to have a ton of spare parts for it laying around.

Anyone have thoughts on what springs would work well for this? How about shackles? I have 4.5" shackles now (1.5" longer than stock). When driving on the road, I want the top leaf to rest on the frame and only open up during flex. I've also considered using some kind of clamp that slides along the frame so it doesn't open up during normal driving, and I could also clamp it down on hill climbs and descents to keep the rearend from unloading. (especially downhills)

Any help is appreciated.
 

· Oh Jesus Tits....
Joined
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3,691 Posts
Discussion Starter · #4 · (Edited)
Trial and error is exactly it. With varying weights and F/R weight distributions of vehicles, it's probably going to be a case by case basis. I have room on the flat part of th frame above the axle for a pretty long 1/4 eliptical spring, but I'm not thrilled at the idea of not having that spring sitting on the frame for highway travel to and from the trailhead (this thing isn't a trailered rig - it has AC and windows :) )

I like the idea of the F350 leaves, but aren't they like 3" wide? I could use an unequal width shackle I suppose to connect the two. I had planned on attaching the thing to the frame with Ubolts and a locating pin.

Again, I'd be interested in hearing from anyone who has messed with these setups as to wheter this idea is even worth considering because it seems real good on paper.

Thanks guys.
 

· Oh Jesus Tits....
Joined
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3,691 Posts
Discussion Starter · #7 ·
Good to know on the F250 leaves. Will do a little more digging on the feasibility. Will need longer brake lines and I'm a little concerned about my driveline length (embarrasing to pull out a slip yoke!)
 
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