Toyota's have trunnion bearings. Some vehicles have king pins. When I asked what kind of trunnions you have, I'm asking what brand bearings and part number you installed. That can affect preload. Anyway hope you get it figured out.
Trunions should not be welded. They are removable. After a while they will wear the race and need to be replaced. That's probably why it won't get to speck, you trunnions may most likely be worn out