96 f-150 front end

on my 96 150 2 wheel drive ,the front wheels are normal when you go forward ,but when you back up the wheels bow in on the top ,both sides ,but as soon as you go forward a few inches they straightens right up .everything is tight in the front end .i can,t see anything wrong .if anyone has an idea ,please let me know .
thanks
bob

That is pretty normal. Ford front ends have been doing that for years. You see it mostly with 4x4s but it happens with 2x4s too.

ok ,because it does steer good. thanks