MHB1382 I was hoping that a Winnie owner would reply - but I CAN give you some info from a similar (??) motor home. I have a '93 Itasca 34' unit with an Oshkosh frame and same engine. The Winnebago specs for my unit are:
GCWR (gross combined weight rating including pulled load):22,000 lbs.
GVWR (gross vehicle weight rating - chassis load only): 18340 lbs.
Suggest you see if you've got the same Oskosh chassis with 18,340 GVWR, AND look at your hitch for load info. My hitch is 5000 lbs towing - but the chassis GCWR limits me to 3660 lbs.
This info comes from a Winnebago spec sheet specific to my chassis and VIN. I could not find any specs sheet attached to the unit. Thankfully, I have all the original books and paperwork. bob_l