I can't figure out why the direction of the car would have an effect on the noise. I have had brake squeal only in reverse. Are you sure its power steering noise? To verify try removing the P.S. belt to see if noise is still present.
mags
September 2010
you would probably get more help from people if you gave vehicle details
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix vans.