If I'm understanding what xtc is describing, maybe they haven't changed as much as I expected. I have a couple of questions after reading this forum if you don't mind. If they are dumb, blame the author.
With the custom boxes, what is it achieving, steering ratio change, heavier duty, variable effort, general feel, etc? I've seen the term "Hydraulic Assist", is that the same as power steering, is it a variation of it. Do the people that have the trucks with the big tires, above 40's, use power (hydraulic assisted?) steering or steering boxes that have higher/lower gear ratio's, depending how you say it.
On a city street/suburban area driven truck, that has never had the steering adjusted and has 156,000 miles on it. About how many miles can the steering box be expected to last. It's had tires on it from 31-10.50-15 to 33-12.50-15 (mostly) and 35's once. I understand that this is a highly subjective question.
Did/Does GM make a truck with a steering box that's heavier duty?
Thank Y'all, I'm gradually learning, Paul