Hi John, They all didnt have them from the factory. they only added them if they needed to.
Sagging or dislocated springs, or a bent axle will also effect caster. Negative caster will cause wandering or not comming out of a turn normally.
Did you check the toe in and toe out? The easiest way is to center the wheels so they are pointing straight.
Drive the truck back & forth in a straight line a couple of times
This will allow the wheels to center themselves
Then with a tape measure,measure the distance from the left tire to the right tire.
Measure from the center of the tread to the center of the tread at the very front of the tire facing the front of the truck. Then on the same wheels measure the tread facing the back of the truck, center to center
Both measurements should be the same.
