Yep. I started that ordeal.
Steering Gear Issues [Solved] - PowerStrokeArmy
This is a direct swap for all the 08-10s I've seen. However, I have heard that there's a few very early Job1s that had a different splines into the gearbox. If you are one of them, you would need to replace the lower steering shaft with the newer updated version. The newer version has the same splines from '10 through '16. Therefore, i assume that '05 to '07s will also require the lower shaft swap. the lower shaft is $200.00.
I found out about this because I got assigned a new company truck back in 2016. The very first thing I noticed was how beautiful it steered! It was on Rails! I started digging around and saw this massive steering gear underneath. One afternoon, I parked my personal truck next to the company truck and did some measuring and noticed the swap would work. After using two Redhead gear boxes in less than 12 months, I was tired of the BS.
However, this is way more expensive than the rainbow-top band-aid aftermarket solutions offered by red, blue, green, purple, yellow, etc... I purchased a brand new box from Ford, and even with my fleet discount it was $700.00 out the door. But, it is a sure thing! My personal truck drives like it should have from day 1.
No more: (1) hard steering while on the brakes and trying to back up a trailer in the mud: (2) wandering steering; (3) binding steering; (4) or hard turning from a dead stop.