I put a new set of Interco IROK BIS PLY tires on my truck (36/13.50/16). I also have ORD heavy duty tie rod and ends. I also have ORD cross-over (every thing has new ORD tie rod ends). Where talking Dana-60 diff here. My problem is that these tires seem to be causing too much stress on the factory power steering system because they are big and heavy tires. This is also causing my truck to handle dangerously on the road. Would I need to go to a Hydro Assist system with tires as big and heavy as the ones I got, or is my situation abnormal for the tires I got?