Yeah it came from the dealer and factory that way but has gotten worse. I noticed it as with the rusty screw heads around as well, when we first picked it up but figured it was common,since the walk around guy at the dealer said it was nothing. Since I have yet to find a service dealer with a lift no one has gotten under for a look to say anything about it.
I have not my self and have had the Motor home now since Nov 2014. I check the tires and all that but never routinely get under to look up there as I did recently. I was shocked at the amount of rust and wonder how long it takes to rust through to break and drop the drive shaft?
2015 Thor Challenger