Originally Posted by RFaber

thanx, i didnt change out the reservior, i dont know that filter in there was ever changed!!! , I dont know what sort of condition the power steering pump itself is in, but i think it may be the final culprit!
my front end bushes are all reasonably new and i used Meyle HD and Loemforder for the rebuild, interesting theory about tires moving in small jumps as the compression threshold is met etc. I tried to test this , by using a smooth plastic food trays under my tires (throwback from my front wheel drive drifting days!!) and had similar jerking motions. I am noticing very small pulsations, not anything that even moves the steering wheel a great deal. As i dig into the issue, i suspect its the power steering pump itself, as the pulses are correlated to engine rpm (each rotation of the pump at idle produces a bump feeling.) at higher rpm the pulses just blend into one motion and therefore arent felt! Looks like a new power steering pump is in my near future!