From what you are describing, I would suspect it to lugging in too high a
gear. Feels like an old stick shift when you forgot to downshift.
All car makers are doing it now to get in higher gears to save on gas
mileage. You can probably feel it as well as hear it.
"Diogenes" wrote in message
Just bought a 2015 Sonata SE with the standard 2.4 liter engine. At 35
mph and ~ 1,300 rpm the engine makes a low frequency sound similar to
a rumble. This happens especially when going up an incline. Dealer
says diagnostic shows car is fine but that sound does not seem to be a
The wars are long, the peace is frail
The madmen come again . . . .