After seeing multiple incidences of failure at the ball joint end of the factory 3rd gen 4Runner lower control arms, Eimkeith designed a system of reinforcement plates to combat cracking from hard & repeated upward compression.
The issue is that while the LBJ support arm is forged and pretty stout, the arm itself is formed sheet steel – and when the bump stop meets the frame, the sheet steel is supposed to stop the upward travel of the wheel/LBJ. Over time and hard use, it cracks:
- requires welding for installation.