Originally Posted by Jcooksey
We have a 2016 Sandpiper fifth wheel 38’, 2008 F350 diesel
Recently replaced tires and rims on truck (20” rims, little aggressive tread) and replaced tires on 5th wheel (14 ply)
Added a back sway bar for stability and still getting a sway with the trailer. We do not have air bags... wondering if anyone has suggestions on why it would be so loose? Steering is a little loose in the truck also. Do we need front stabilizers for truck? Any help is appreciated!
Read up on "Ford Memory Steer". Seems Fords are notorious (including my Excursion) for having zero "center return" action when they get some wear in the ball joints. Bad news is, improperly installed new ball joints will also screw up steering.
What happens is: If you dial the wheel over to the left a little, and take your hands off, it stays over to the left. Like the steering is really stiff. Then you turn a little to the right and it stays to the right.
It's not really "swaying" you are feeling, but the effects of memory steer.
P.s. If you steering box is 'loose' or worn, that make the effect even greater.