I found out why Friday morning. Luckily we were 50yrds from the house and were going 3-5mph when the ball joint failed. Nothing damaged and nobody hurt. I got it towed back into he garage and replaced both ball joints last night. I wanted to post this just in case anyone was searching for a reason as to why their steering was getting considerably tighter and their steering wheel was getting difficult to turn. I just bought the truck and the PO said he thought the rack was going out, so that's where my mind automatically went to. Hope this saves someone down the road.