I have a 93 150 4x4. The truck runs straight down the road, but the out edge of both front tires is wearing. I took it in the shop once for allignment but it continues to wear. Just wondering what to ask them to look for. Any help appreciated, thanks.

Also the front end is tight, good ball joints, etc.

BTW, getting my cancer cured on fender wells and rocker panels this week.

Chuck