I was just wandering this same thing last week! I heard a little taxi-driver-tip somewhere so I tried it: Just place a small pillow behind your back, resting just above the lumbar or midback helped me.IT HELPED SO MUCH! I am closer to the steering wheel so I can keep my spine organized but also my shoulders. My seat prevented it from rolling back and down since the cushioing was there. Not anymore! The pillow puts space between my shoulder and the cushion now. I also find that checking my blind spot is so much easier- I just brace my core and rotate. No more craning my neck with my shoulder rolled forward.