The owners manual on page 7-18 the third paragraph reads;
"A towed vehicle usually should have the front wheels off the ground."
On page 7-20 under recreational towing it refers back to pages 7-18and 7-19 and follow instructuions.
A search for RV flat towing may provide some additional information. My guess is it's probably OK, I don't think the transmission has an oil pump, as I said it's a guess.
Clifton
Not definate answer.