Welcome to the fourm
is this a new unit?
The E450 chassis is notoriously misaligned form the Thor factory (not from the ford factory.)
Pulling can be from misalignment, that side low tire pressure, or brake dragging.
simplest thing you can do is check you tire pressure. they can be low form the factory also. mine was at 60PSI when the door label said 75 to 80.
Thor Forums
