Can worn steering components cause vibration in my truck?

My truck is a 2002 Ford F-250 Super Duty XL crew cab long bed with a 7.3L powerstroke turbo diesel and an E40D 4 speed automatic currently with 236k miles.

For a while now I've been dealing with a stubborn vibration problem it exhibits between 40-50 mph. At first I thought I needed u-joints and a support bearing for the 2 piece drive shaft. So I had all that replaced because I confirmed that the u-joints were worn due to play when you wiggle the shaft. However, the vibration persisted. Then just recently, I changed the front pads, rotors, and wheel bearings and that made the vibration diminish drastically (since the rotors were warped and the bearings were worn out too), but there is still some residual vibration at the same speed range. I wonder if maybe it has to do with the steering box and one of my tie rods being slightly worn that is still making the truck vibrate. If so, then changing those out will be my next move. I'm just wondering if anyone out there concurs with me or should I be looking elsewhere for my problem?