It started out pulling one way or the other when you went around a corner, now coming home it started to pull when I came around a corner on the highway first one way and then the other like you were hitting ruts in the road. I have had the steering gear box replaced twice and it still does it.
I don’t mean to be snarky, I think you need a second opinion from another mechanic.
What about the rest of the steering linkage? Replaced?
Tires and bad wheel bearings can cause this too.
You need a good suspension shop to have a look.
Have new tires,had the front wheel bearings replaced,the drag link replaced,have been to two different top mechanics,I am at a loss,I love the truck but am ready to get rid of it if somebody can’t fix it.
Tramlining? Is this 1953 Budapest?
Over inflated steer tires ?
Has it been on the alignment rack? Just wondering about a caster issue is why I ask.
Pulls one way or the other? Try looking at the bushings.