There is a bush at the bottom of the steering shaft which goes oval if you do not keep it lubricated.
As it is almost impossible to get to no one but the most fastidious techs ever lube it
Because the rack gear is curved turning the wheel one way pulls the gears together while the other direction pushes them apart .
#4
StarTech
Also the screw holding the shaft in place is a #4 Phillip and is Loctited in place. You need a high torque (impact) rated bit to remove the screw.