Steering wheel angle while towing

Very interesting...some noodling questions...

Assume those pictures are where it stays that way and not wandering back and forth

If wandering back and forth, worn steering components


If steady, then start at the tires slip angle.

'P' class with higher aspect ratio has more slip angle than lower profile...or
higher strength sidewalls. Also the rim width vs tire recommended rim width plays
As does the amount of sidewall bendback...keep this thought for later


If the WD and/or friction device is 'off center', it can hold the setup going
'that-a' way and the tire's slip angle now plays into this

OP, on this...what is the size and type of your tires? These latest
trucks have larger dia wheels both for looks and lower profile tires
Lower profile tires does help or do a better job of controlling than
higher aspect ratio tires of past (except for higher rated sidewalls)

For those who think a friction device or WD setup can't do this...think
of this...it is to control yaw (sway) of a trailer weighing in at
SEVERAL TONS. So the forces it 'can' impart is larger than you think


Key for me, is that is is NOT wandering (to be confirmed by the OP)
and that it holds steady at those off center steering wheel setings

Another possibility is that the 'center' sensor for the sterring
system is 'off' or not well...