From the factory our Range Rover’s upper wishbone attached to the axle using a huge piece similar to a tie-rod end; it bolted between two forged upper arms. We built this housing to hold the uniball. The whole housing is TIG-welded mild steel. You can also see the brass slug that takes the place of the uniball during welding. You don’t want to ruin the uniball with heat and weld spatter before it ever gets used.