Bump steer is not caused by loose parts... that's just worn *** suspension.

Bump steer is caused by having shitty steering geometry.

Look at the front of your truck... If the control arms are at a 0 degree angle(flat) and your tie rods are at a 20 degree angle... then when you hit a bump they will both travel in different arcs, so as a result it will give you "feedback" and cause the wheel to jerk violenty in one direction OR your vehicle will dart in one direction... depending on steering system/power assist and suspension geometry.


When you change it's "normal" range of motion(dropped 3" from where it was designed to be)... then you are changing the arcs of both the CAs and tie rod... so to get it as close back to stock as normal, you'll need to correct the tie rod angle so it more closely follows the factory intended negative bump-steer.


In factory form... when you raise the truck up(suspension droops)... the wheels should toe in... And when you bump the suspension, it will toe out. This is generally harmless because it will induce negative bump-steer.

What I'm guessing as that the arcs of your messed up geometry are causing the opposite so when you hit bumps the wheels toe in and will dart the direction opposite of which wheel hit the bump(ie: right wheel hits bump, vehicle goes left).

I honestly don't have a ton of experience in fabbing up SLA suspensions so I know there are some other factors at play... but when it comes to solid axle suspensions it is critical to keep the drag link and track bar parallel and equal length so as to not induce bumpsteer.

Notice my track bar and drag link are parallel? They also happen to be the same length +/-1/4"



The same concept applies to your truck... except it has to be right on both sides since both of your tie rods take place of my drag link(steering connection) and your control arms take place of my track bar(which locates the wheels left to right).

I'm in Dayton too, so if you want to shoot the **** about this let me know

 

well there's certainly no doubt that my OEM suspension parts were well past their prime. The ball joints in the LCAs were getting that way as well.
My truck now drives a ton better. yesterday, Friday, I was runing thru Dayton and got caught in road resurface type construction. It still beat the hell out of me, but I never once felt like the truck was going to get away from me like it used to.