I have a friend Roger (he's a RV.Net Poster) and he shares the driving with his wife. They own a DP Winnebago Journey and when there on the road and he's not driving he can't sleep because the diesel engine is too loud! He insulated the diesel engine compartment under his bed and he told me that didn't help very much and when the Jake Brake was applied it rattled him out of bed. I don't understand all the loud noise from a gasser? I guess a lot of RVers drive in complete silence? I have my coach stereo CD system on moderately when driving and I don't recall a lot of engine noise! I know Winnebago and Monaco both built rear end gas engines at one time.