Thanks for your comments regarding (1) changing pulleys, and (2) pointing the finger to the hydraulic winch.
I just did some experimenting with my power steering pump. I drilled out the orifice to get more volume and placed shims under the spring to get more pressure. For sure, my MileMarker hydraulic winch speed has improved. Steering on the trail in lower gears (did the Rubicon this past weekend) was also improved. However, driving home on the freeway I seemed to have lost the power assist. Started to back my FJ-40 into the driveway at home and power assist was restored. I had power steering again just like i had on the trail. I'm truly confused now. I'm wondering if maybe the power steering fluid is now getting too hot at highway speeds (or too much pressure and relieving).
Looks like I solved one problem and created another one!! Progress is not too good at that rate.
Don
Pleasanton, Ca