I think I figured out my handling problem

[Jimal]

I've been chasing a weird handling problem for about as long as I've had the truck on the road, and although I've replaced some really crust old parts (cab mounts, transfer case mounts), the problem has never really gone away. I've been getting some driveline wrap when I first take off from a stop (the rear of the truck feels like it is lifting) and I get a weird seat of the pants wiggle on decel.

I went to look at something else under the back of the truck and stumbled into this.





Note the gap between the leaf spring and that big girder looking perch. I might soak these things in deep creep and see if I can tighten them down, but I'm sure they're not going to take that well. I'm looking at the parts schematic on LMC and that piece doesn't appear and the u-bolts they show are much shorter.

Thoughts?