Originally Posted by NWJeeper
Could be a safety issue for sure. Also a warranty problem as far as Ford is concerned since the literature that Steve dug up said anything over 3/4" would void the warranty.
Agreed on both fronts. Mine doesn't track well in the rear. The Ford standard front track bar works well, but my rear wanders WAY too much. I have a rear track bar to install once the weather warms up a bit. Removing this shim won't hurt.
I'll make a wild guess that Forest River bought a bunch of chassis, modified them all with the shim based on an older floorplan/design that had crappy weight distribution, then forgot to change them back after fixing the weight issue.
Personally I'm happy that we don't need a shim on one side. We are just lucky that NWJeeper noticed it.
In the future, I'll be looking for shims when I buy another RV.. Shims = mismatched floorplan/chassis.