I'm not sure what the ratio is on my PSC box. They call it "Caddilac valving". I hated the stiff steering of the old box. This one, I can steer the truck with 1 finger.
Even with a new box, DSS, Thuren's track bar, and newish steering parts, I still have alot of steering wander. I feel like I'm in a Duke of Hazzard show the way I have to saw the wheel back and forth to keep the truck on the road :-laf
Crappy heat and A/C, poor lights, weak brakes, wandering steering... if it wasn't for the Cummins, I would have ditched this thing a long time ago!