If I understand what Goatman and Vintagespeed is saying, when your normal steering goes to full lock, the pump goes into bypass mode thus preventing major carnage to the steering box.
But when there is a ram with more stroke then the box, the ram continues to take fluid even the though the steering box has reached the end of it's travel. As a result, the pump doesn not go into bypass and continues to feed the ram fluid. So now your ram is pushing against the the steering box (and other suspension components) and somethings going to have to give.
Did I explain that right? I've been evesdropping on this topic trying to learn more about hydro assist, so lets see if I've learned anything :wierd:
Something else I wanted to point out, someone said full hyrdro is iffy cause you could blow a hose while driving and lose your steering. How is that any worse then having a tie rod end break of something?