not to start an argument but how can shackles be dangerous? especially warrior shackles? if anything running stock shackles on lift springs and offroading would be more dangerous than running lift springs or soa with warrior shackles. i dont know just my .02.
Apparently you have never seen a rear spring buckle from the downward force of a shackle. A lift shackle negatively de-archs a spring, and the force is applied at the bushing eye to the spring pad at axle, causing it to de-arch itself at one half of the leaf spring, springs are not meant to do that, and ultimately could and will fail, either by folding over, or by flattening out or snapping in half or cracking a spring at the spring pad or snapping off at the leaf spring bushing eye.
This is a illustration as to what a normal ride spring with stock shackle vs a lifted shackle and what happens to the leaf spring.
1.) One represents the leaf spring bushing eye at stock configuration.
2.) Two represents the stock shackle
3.) Represents lifted shackle
4.) Four represents the flattening of the leaf spring from using the new lift shackle (notice how similar to the level plain you are now at from the leaf bushing eye bolt to the leaf spring axle pad from the force the shackle is creating on the rear portion of the leaf) Since the leaf is damn near flattened and level with the axle leaf pad, any harsh upward compression could cause the leaf to buckle and fold under.
5.) Five represents the leaf spring axle pad and the U-Bolts needed to secure the spring to the axle.
Now in my lifetime I have seen springs flatten to the point to where they fold under while driving, snap in 2 at the leaf pad at axle, or crack thru the main leaf at the pad. I have also seen the military wrap at the bushing snap off. So yes, they are dangerous and costly in the end.
Shackles are nothing more than a cheap excuse for a lift, and using them with a compromised weak spring furthers negates the safety of them. Alot of the users on here praise them because they know no better, young, first lifted vehicle of any sort, and do not hang on to their vehicles long enough to really care.