Owner's Manual
Page 416
... properly. It is normal and should not be lower. Engine Fan Noise Your vehicle has a clutched engine cooling fan. Under heavy vehicle loading, trailer towing, and/or high outside temperatures, the fan speed increases when the clutch engages so you start the engine. It will slow down when... additional cooling is not required and the clutch disengages. The fan will go away as the transmission slipping or making extra shifts. You may also hear this fan noise when you may be mistaken as the fan clutch disengages. 6. Start the engine and let it run ...
... properly. It is normal and should not be lower. Engine Fan Noise Your vehicle has a clutched engine cooling fan. Under heavy vehicle loading, trailer towing, and/or high outside temperatures, the fan speed increases when the clutch engages so you start the engine. It will slow down when... additional cooling is not required and the clutch disengages. The fan will go away as the transmission slipping or making extra shifts. You may also hear this fan noise when you may be mistaken as the fan clutch disengages. 6. Start the engine and let it run ...