Hotchkis leaf issue, sits like 4x4.

Mine was the same, no reasonable amount of weight or bouncing would reset them. Try using a pry bar to physically move the shackles to the correct angle and see if they stay there. When I did it on mine the shackles actually popped back once I got them started in that direction.

I also had some weight on the springs, I used a jack and stands to lift/support the frame to take some weight off the springs but I needed a little load to get the shackles and suspension assembly to all move smoothly together. Kind of a balancing act where you have some load to get the movement you want but not so much that it cripples you if/when it unloads. There’s probably a better way to do it, but that’s what it took to get mine done.

I can't get em to stay back. They'll rotate to the back but always return. Freind with the valiant just came over here are shots showing his under carriage. Same rear suspension set up as mine. His springs are way flatter and shackles point to the back.

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