Im not going to say it.........

Think hard about what it is doing, you simply have too much drive going to the rear wheels. If you dont want the center diff i think the next best thing is going to be the Exotek front lock out and garodisc. If the truck is getting upset over the bumps go lighter springs, softer fluid and run the shock mounts on the inside. You can also try the 3-3 block, it will give you mroe rear traction at the expense of more entry rotation and it will stiffen the rear suspension while under acceleration. On a rough track it doesnt work very good.

It has long been a known fact that the truck is a handful on the loose stuff , nothing new.