The steering on my '91 745 is ultra sensitive at highway speeds. Only the slightest pressure on the steering wheel causes left or right movement and then I must correct this movement and it is very easy to overcorrect due to the extreme sensitivity. Also, I notice when I turn the wheel to the left when stopped or at slow speed, I get a pulse of "pushback" on the wheel, followed by practically no resistance so it is a constant effort to maintain the correct turning radius. My guess is a bad steering rack but I would appreciate responses before I dive into replacing it.