Originally Posted by Danesville
Pashooter is correct, I own the F53 master shop manual and it is a 40 spline shaft. The manual does state remove the nut and re-index the steering wheel to the desired position , re torque the nut and you are good to go
What years would your shop manual cover? I know they changed stuff in the early 2000"s but that's about it except for small stuff. I know I like the stock front Ford sway bar on my 2015, for instance. The TSB talked about a centering mechanism in the box itself so I can see where that would need to be addressed before you did any other tweaking. So, if your manual is inclusive of the late models it looks like ol' Pashooter has the straight stuff. Good to know as I continue to improve the driveability of my rig.