Mine have the strap style clamps on them(looks like the ones that hold stacks of lumber together) only on the front tho. They are 3 leafs right now. I took the over load out. The only thing that i can think it is would be that when i ordered the springs from the junk yard i asked for the 2wd and maby the gave me 4wd? i realy dont know.
And here is some "trying to flex" pics
When the rear suspensionstarts to flex out it feels like it gets tippy. Like the suspension dosnt conform to the terrain.