I'm with Richard! All the ailments of a panhard bar can be eliminated by doing away with the panhard bar and installing Watts linkage! As a suggestion, perhaps when you were doing the design and mock up on your panhard bar you didn't take into account the side load forces on the bar when cornering, or just backing out of the garage and turning too sharp? I've seen a lot of suspension designs fail under load that worked perfect when the car (truck) is sitting still with none of the twisting, torquing, and turning forces applied to it.