2005 Ford F250 Wandering

Take a goog look at the steering box. I replaced the drag link, tie rods, ball joints. It was the gear box that fixed my problem hope this helps [quote:d0a4249605="Bunster"]Steering problem
2005 Ford F250 V8 Four Wheel Drive Automatic 85000 miles

Hi.... my question is, I was wondering why my Effie wanders, at times fairly badly.... when it first happened... I got it wheel aligned and checked by Trueline, who said it was slightly out and they replaced a bush of some kind which really made no difference. the last set of tyres (offroad wore very well and and lasted around 80000kms.). I now have a set of 22 inch road tyres which I hoped would rectify the wander but alas no difference probably worse if anything. Where would you recommend be the next place to check....tahks in advance...
Bunster[/quote:d0a4249605]