I had a 2002 chassis with built date of June 2002 and at present own a 2003 chassis with built date of August 2003.
Neither one of them have/had shown signs of any leakage on the steering gearbox.
I would call Freightliner RV support and get their input before driving to the service center that way you have a heads-up opinion to present to the old reply, "They all do that".
Ron