Most roads are made with a slope to the outside edge. Are you sure the "lean" is not just an allusion because the road itself has a lean? Find somewhere where you know the surface is flat, like a very large parking lot. Drive there and see what the rig looks like.
I had a horrible time with my truck dealership repair shop when the truck was new. I kept complaining how the truck seemed to always pull to the right. LONG story short, after a couple front end alignments, changed tires, and replacing springs, it still pulled to the right. Then one day I was driving on a truly "flat" road and noticed it had no pull. That's when I realized, and really started taking note of how many roads are built with slopes to the edge for water drainage. When towing my 5er, I can really see the "lean" because the 5er is so tall.
It's just something to consider before tearing things apart that don't need to be torn apart.