Just recently re-worked the ute bed mounts and re-designed / re-enforced the way it all mounts to the frame. The beta version revealed some inherent flaws for the trucks intended uses. Because of how much the frame flexes and the bed doesn't, it was creating some ...conflict shall we say. I wanted to go through it all and create a way to spread the load with out too many attachment points between the bed and frame, the idea being to allow the bed to "float" as needed but still have plenty of support. On my last trip to Moab I had one of the forward mounts behind the drivers side of the cab collapse an inchas a 1 inch steel block punched through the c channel it was welded too! I had to do some fast McGyvering and luckily had a big 3/4x2x18 piece of steel intended as part of a sand anchor for winching handy and was able to create a "splint" to support the c channel holding up the bed. The problem was the previous owner had focused waay to much load in a small area. Being in a rush to finish the project didn't allow for the time to really go through the mounting system the way I originally should've.
Unlike the stock bed the Ute bed does not lay across the lengths of frame rail so to spread the load across more of the frame rail and still allow movement of the frame and bed interface I used pressure treated 4x4 beams of wood, in the forward part of the bed I have 2 -2 foot beams behind the steel frame mounts going along the frame rails I then lag bolted another 4x4 beam going across the width of the ute bed which lays across the frame rail beams. For an added support in rear part of the bed I used a beam lag bolted perpendicular to the frame rails on brackets that were used originally to support a fifth wheel hitch.
Anyway live n learn, the new set-up seems to be light years more solid and shows much less flex, noise, and general movement between the bed and cab and looks to be working as intended.
I did a bunch of off roading across NV, CO & NM to test it and fingers crossed she's good to go now!
It may not be as sexy as some of the 3 point pivoting, super engineered systems I've seen but sometimes keeping it simple and lightweight is just the ticket at least for me.